Online research in philosophy

Change blindness—our inability to detect changes in a stimulus—occurs even when the change takes place gradually, without disruption (Simons et al., 2000). Such gradual changes are more difficult to detect than changes that involve a disruption. In this experiment, we extend previous findings to the domain of facial expressions of emotions occurring in the context of a realistic scene. Even with changes occurring in central, highly relevant stimuli such as faces, gradual changes still produced high levels of change (...) blindness: Detection rates were three times lower for gradual changes than for displays involving disruption, with only 15% of the observers perceiving the gradual change within a single trial. However, despite this high rate of change blindness, changes on faces were significantly better detected than color changes occurring on non facial objects in the same scene. (shrink)

In children experiencing pain, the study of the social context of facial expressions might help to evaluate evolutionary and conditioning hypotheses of behavioural development. Social motivations and influences may be complex, as seen in studies of children having their ears pierced, and in studies of everyday pain in children. A study of opposing predictions of the long-term effects of parental caregiving is suggested.

In this article we discuss the aspects of designing facial expressions for virtual humans (VHs) with a specific culture. First we explore the notion of cultures and its relevance for applications with a VH. Then we give a general scheme of designing emotional facial expressions, and identify the stages where a human is involved, either as a real person with some specific role, or as a VH displaying facial expressions. We discuss how the display (...) and the emotional meaning of facial expressions may be measured in objective ways, and how the culture of displayers and the judges may influence the process of analyzing human facial expressions and evaluating synthesized ones. We review psychological experiments on cross-cultural perception of emotional facial expressions. By identifying the culturally critical issues of data collection and interpretation with both real and VHs, we aim at providing a methodological reference and inspiration for further research. (shrink)

I agree with Williams that evolutionary theory provides the best account of the pain expression. We may disagree as to whether pain has an emotional dimension or includes discrete basic emotions as integral components. I interpret basic emotion expressions that occur contemporaneously with pain expression as representing separate but highly interactive systems, each with distinct adaptive functions.

As a product of natural selection, pain behavior must serve an adaptive function for the species beyond the accurate portrayal of the pain experience. Pain behavior does not simply refer to the pain experience, but promotes survival of the species in various and complex ways. This means that there is no purely respondent or operant pain behavior found in nature.

A functional interpretation of facial expressions of pain is welcome. Facial expressions of pain may be useful not only for communication, such as inviting help. They may also be of direct use, as parts of writhing pain behavior patterns, serving to get rid of pain stimuli and/or to suppress pain sensations by something akin to hyperstimulation analgesia.

ERPs (event-related potentials) correlates are largely used in cognitive psychology and specifically for analysis of semantic information processing. Previous research has underlined a strong correlation between a negative-ongoing wave (N400), more frontally distributed, and semantic linguistic or extra-linguistic anomalies. With reference to the extra-linguistic domain, our experiment analyzed ERP variation in a semantic task of comprehension of emotional facial expressions. The experiment explored the effect of expectancy violation when subjects observed congruous or incongruous emotional facial patterns. Four (...) prototypical (anger, sadness, happiness and surprise) and four morphed faces were presented. Moreover, two distinct cognitive tasks (an implicit vs an explicit elaboration) were analyzed in order to evaluate the influence of spontaneous decoding in N400-like effects. An automatic, high-order cognitive process was found, elicited by a negative ERP variation similar to the linguistic N400 effect, which allows us to explain the congruous/incongruous decoding in semantic extra-linguistic comprehension. (shrink)

Facial expressions of pain may be best conceptualized as an example of an evolved propensity to communicate distress, rather than as a distinct category of facial expression. The operant model goes beyond the evolutionary account, as it can explain how the (facial) expression of pain can become maladaptive as a result of its capability to elicit attention and caring behavior in the observer.

An automated system for monitoring facial expressions could increase the reliability, sensitivity, and precision of the research on the relationship between facial signs and experiences of pain, and it could lead to new insights and diagnostic methods. This commentary examines whether the research on facial expression of pain, as reported by Williams, provides a sufficient basis for machine understanding of pain-associated facial expressions.

This paper specifies two hypotheses that are intimated in recent research on empathy and mindreading. The first, the phenomenal simulation hypothesis, holds that those attributing mental states (i.e., mindreaders) sometimes simulate the phenomenal states of those to whom they are making attributions (i.e., targets). The second, the phenomenal mindreading hypothesis, holds that this phenomenal simulation plays an important role in some mental state attributions. After explicating these hypotheses, the paper focuses on the first. It argues that neuropsychological experiments on empathy (...) and behavioral experiments on imitation provide good reason to think that mindreaders sometimes simulate targets' phenomenal states. Accordingly, the paper concludes, the phenomenal mindreading hypothesis merits consideration. (shrink)

This paper proposes that human expression of pain in the presence or absence of caregivers, and the detection of pain by observers, arises from evolved propensities. The function of pain is to demand attention and prioritise escape, recovery, and healing; where others can help achieve these goals, effective communication of pain is required. Evidence is reviewed of a distinct and specific facial expression of pain from infancy to old age, consistent across stimuli, and recognizable as pain by observers. Voluntary (...) control over amplitude is incomplete, and observers can better detect pain that the individual attempts to suppress rather than amplify or simulate. In many clinical and experimental settings, the facial expression of pain is incorporated with verbal and nonverbal vocal activity, posture, and movement in an overall category of pain behaviour. This is assumed by clinicians to be under operant control of social contingencies such as sympathy, caregiving, and practical help; thus, strong facial expression is presumed to constitute an attempt to manipulate these contingencies by amplification of the normal expression. Operant formulations support skepticism about the presence or extent of pain, judgments of malingering, and sometimes the withholding of caregiving and help. To the extent that pain expression is influenced by environmental contingencies, however, “amplification” could equally plausibly constitute the release of suppression according to evolved contingent propensities that guide behaviour. Pain has been largely neglected in the evolutionary literature and the literature on expression of emotion, but an evolutionary account can generate improved assessment of pain and reactions to it. Key Words: adaptation; evolutionary psychology; facial expression; pain. (shrink)

The facial expression of pain is the end product of a complex process that is, in part, emotional. The evolutionary study of facial expression must account for the social nature of human consciousness and should address the questions of why empathy exists, the adaptive importance of empathy, and whether facial expression is a mechanism of empathy and second-person consciousness.

Williams and the many studies she considers appear to assume that voluntary amplification in facial expression of pain implies dissimulation. In fact, the behavioral ecology model of pain expression is consistent with amplification when subjects in pain are in the presence of others disposed to render aid, and that amplification may well be voluntary.

The proposal that there are specific adaptations for the expression and detection of pain appears premature on both conceptual and empirical grounds. We discuss criteria for the validation of a pain facial expression. We also describe recent findings from our lab on coping styles and pain expression, which illustrate the importance of considering individual differences when proposing evolutionary explanations.

The experience of pain appears to be associated, from early infancy and across pain stimuli, with a consistent facial expression in humans. A social function is proposed for this: the communication of pain and the need for help to observers, to whom information about danger is of value, and who may provide help within a kin or cooperative relationship. Some commentators have asserted that the evidence is insufficient to account for the consistency of the face, as judged by technical (...) means or in the perceptions of observers, or that facial expression is epiphenomenal to a gross behavioural defensive response to pain. The major criticism is that it is unnecessary to invoke evolutionary mechanisms beyond the emergence of an unconditioned facial response to pain in neonates, subsequently shaped and maintained by instrumental and social reinforcement throughout life. These criticisms are addressed, acknowledging the need for further data to address some, and elaborating the areas in which evolutionary and operant mechanisms would predict different behavioural interactions, rather than acting synergistically. Several supportive commentaries propose extending evolutionarily-based hypotheses to sex differences, the complexities of others' responses within the social relationship, and the role of empathy. A number of commentators provided valuable suggestions for experimental paradigms or methodological issues. Overall, addressing these issues indicates the need for further conceptual development and for collection of data specifically in relation to these hypotheses. (shrink)

We are defined by our faces. They give identity but, equally importantly, reveal our moods and emotions through facial expression. So what happens when the face cannot move? This book is about people who live with Möbius Syndrome, which has as its main feature an absence of movement of the muscles of facial expression from birth. People with Möbius cannot smile, frown, or look surprised or sad. Talking and eating are problematic, since their lips do not move. Even (...) looking around is also difficult since the eyes cannot move either. -/- The book is unique in giving those with Möbius a voice, allowing children and adults with the condition to explain what it is like. These fascinating biographies reveal much about the relations between face and facial expression, and emotional expression and emotional experience which we normally take for granted. The narratives also show the creative ways in which those with Möbius construct their lives and how they come to terms with and express their identities with, and yet, beyond their faces. Some with Möbius have been thought to have learning difficulties and autism, since an impassive immobile face has been assumed to reflect inner cognitive problems. This book criticises such work and asks people to look not only at the face but beyond it to see the person. -/- Throughout the book, several themes emerge, of which perhaps the most surprising is the reduced emotional experience those with Möbius can have as children and young adults and the journeys they go on as they realise this and then assimilate emotion from the outside in. -/- The result of a 4 year collaboration between a clinician/neuroscientist and a teacher/lobbyist who lives with Möbius, 'The Invisible Smile' provides an authentic, personal, and moving account of this disorder. (shrink)

Women typically report more pain than men, as well as exhibit specific sex differences in the perception and emotional expression of pain. We present evidence that sex is a significant variable in the evolution of facial expression of pain.

Inverting a face impairs perception of its features and recognition of its identity. Whether faces are special in this regard is a current topic of research and debate. Kanizsa studied the role of facial features and environmental context in perceiving the emotion and identity of upright and inverted faces. He found that observers are biased to interpret faces in a retinal coordinate frame, and that this bias is readily overruled by increased realism of facial features, but not easily (...) overruled by environmental context. An additional factor contributing to a retinal coordinate-frame interpretation may be the ambiguous nature of the face stimuli. Since his facial expressions are interpretable both upright and inverted, they may in both orientations activate an endogenous attentional process for faces. We present visual search and change-blindness experiments that explore how inversion, negation, and facial emotion affect visual attention to static faces. We find that attention to faces is impaired by inversion and negation. We also find that the parts of the face that receive greater attention can be influenced by the emotional expression of the face. We propose to extend these experiments to dynamic faces. To this end, we develop a theory of the visual representation of dynamic faces, in which faces are represented by classes of `spacetime fragments'-moving regions of the face with high informational content. We then present ideas for future experiments which are motivated by the spacetime fragment theory, and which should serve to constrain its further development. (shrink)

What differentiates expressions of pain from other facial expressions? Which facial features convey the most information in an expression of pain? To answer such questions we can explore the expertise of human observers using psychophysical experiments. Techniques such as change detection and visual search can advance our understanding of facial expressions of pain and of evolved mechanisms for detecting these expressions.

Facial responses to pain might be the result of evolution but Williams' interesting “Just So” story provides no convincing evidence for her hypothesis. Contrary to her hope, casting facial action in an evolutionary perspective will probably not reduce the common practice of health care professionals blaming patients for their problems; instead, it may discourage appropriate treatment.

In this paper I argue that one of the functions of the perceptual system is to detect other people’s emotions when they are expressed in the face. I support this view by developing two separate but interdependent accounts. The first says that facial expressions of emotions carry information about the emotions that produced them, and about some of their properties. The second says that the visual system functions to extract the information that expressions carry about emotions.

A common assumption among philosophers is that every language has at most denumerably many expressions. This assumption plays a prominent role in many philosophical arguments. Recently formal systems with indenumerably many elements have been developed. These systems are similar to the more familiar denumerable first-order languages. This similarity makes it appear that the assumption is false. We argue that the assumption is true.

The purpose of this paper is to uncover and correct several confusions about expressions, tokens and the relations between them that crop up in even highly sophisticated writing about language and logic.

It is widely believed that empathy is a good thing, from a moral point of view. It is something we should cultivate because it makes us better people. Perhaps that’s true. But it is also sometimes suggested that empathy is somehow necessary for morality. That is the hypothesis I want to interrogate and challenge. Not only is there little evidence for the claim that empathy is necessary, there is also reason to think empathy can interfere with the ends of morality. (...) A capacity for empathy might make us better people, but placing empathy at the center of our moral lives may be ill‐advised. That is not to say that morality shouldn’t centrally involve emotions. I think emotions are essential for moral judgment and moral motivation (Prinz, 2007). It’s just that empathetic emotions are not ideally suited for these jobs. Before embarking on this campaign against empathy, I want to say a little more about the target of the attack. What is empathy? And what would it mean to say empathy is necessary for morality? With respect to the first question, much has been written. Theories of empathy abound. Batson et al. (1995: 1042) define empathy as, “as an other‐oriented emotional response congruent with the perceived welfare of another person.” This is not the definition I will be using. Batson’s construct might be better characterized as “concern,” because of its focus on another person’s welfare. Indeed, in much of his research he talks about “empathetic concern.” Notice that this construct seems to be a combination of two separable things. Being concerned for someone is worrying about their welfare, which is something one can do even if one doesn’t feel what it would be like to be in their place. One can have concern for a plant, for example, and an insect, or even an artifact, like a beautiful building that has into disrepair. Empathy, seems to connote a kind of feeling that has to be at last possible for the object of empathy. If so, “empathetic concern” combines two different things—a find of feeling‐for an object and a feeling‐on‐behalf‐of an object. Much of the empirical literature, including the superb research that Batson has done, fails to isolate these components, and, as a result, some of the existing studies are confounded. They purport to show the value of empathy, but may really show the value of concern. My focus below will be on empathy, and I leave it as an open possibility that concern is highly important, if not necessary, for morality. Indeed, concern often seems to involve an element kind of moral anger, which I will argue is very important to morality. It is also important to distinguish empathy from sympathy. Suppose I feel outraged for someone who has been brainwashed into thinking she should follow a cult leader who is urging mass suicide. That would not necessarily qualify as empathy. As Darwall (1998: 261) points out, sympathy is a third‐person emotional response, whereas empathy involves putting oneself in another person’s shoes. But 1 Darwall’s definition is also somewhat problematic. He says, “Empathy consists in feeling what one imagines he feels, or perhaps should feel (fear, say), or in some imagined copy of these feelings, whether one comes thereby to be concerned … or not.” This definition has two features, which I would like to avoid. First, the appeal to imagination seems overly intellectual. Imagination sounds like a kind of mental act that requires effort on the part of the imaginer. As Darwell recognizes, empathy in its simplest form empathy is just emotional contagion: catching the emotion that another person feels (Hatfield et al., 1994; Hoffman, 2000). It seems inflated to call contagion an imaginative act. Also, I want to resist Darwall’s application of “empathy” to cases where one has a feeling that someone should feel, but does not feel. The problem is that this tends to blur the distinction between empathy and sympathy. Suppose I encounter a member of a cult who is delighted by the cult leader’s nefarious plans. The cult member should by afraid, but is not. If I feel fear on the cult member’s behalf, that is not putting myself in the cult member’s shoes. As I will use the term, empathy requires a kind of emotional mimicry. I do not wish to imply that empathy is always an automatic process, in the way that emotional contagion is. Sometimes imagination is requires, and sometimes we experience emotions that we think someone would be experiencing, even if we have not seen direct evidence that the emotion is, in fact, being experienced. For example, one might feel empathetic hope for a marathon runner who is a few steps behind the runner is first place, or anxiety for the first place runner, and the second place runner catches up. We can experience these feelings even if the runners’ facial expressions reveal little more than muscular contortions associated with concentration and physical exertion. A situation can reveal a feeling. The core idea, as I will use the term, is that empathy is a kind of vicarious emotion: it’s feeling what one takes another person to be feeling. And the “taking” here can be a matter of automatic contagion or the result of a complicated exercise of the imagination. I don’t think there is anything anachronistic about this notion of empathy. I think it has a long tradition in moral philosophy, even though the term “empathy” is only 100 years old. The British moralists, including David Hume and Adam Smith, used “sympathy” in way that is similar to the way I want to use “empathy.” Here is Smith (1759: II.i): “Whatever is the passion which arises from any object in the person principally concerned, an analogous emotion springs up, at the thought of his situation, in the breast of every attentive spectator.” My question, in the pages that follow, is whether empathy so‐defined is necessary for morality. I should note again, in advance, that the empirical literature does not always distinguish between the constructs I have been discussing, but I do think that all the studies I discuss below can, by inference at least, shed some light on empathy as defined here. The suggestion that empathy is necessary for morality can be interpreted in at least three different ways. One might hold the view that empathy is necessary for making moral judgment. One might think empathy is necessary for moral development. And one might think empathy is necessary for motivating moral conduct. I think each of these conjectures is false. Empathy is not necessary for any of these things. We can have moral systems without empathy. Of course, it doesn’t follow directly that empathy should be eliminated from morality. One might think the modal question—Can there be morality without empathy?—and the related.... (shrink)

For many years emotion theory has been characterized by a dichotomy between the head and the body. In the golden years of cognitivism, during the nineteen-sixties and seventies, emotion theory focused on the cognitive antecedents of emotion, the so-called “appraisal processes.” Bodily events were seen largely as byproducts of cognition, and as too unspecific to contribute to the variety of emotion experience. Cognition was conceptualized as an abstract, intellectual, “heady” process separate from bodily events. Although current emotion theory has moved (...) beyond this disembodied stance by conceiving of emotions as involving both cognitive processes (perception, attention, and evaluation) and bodily events (arousal, behavior, and facial expressions), the legacy of cognitivism persists in the tendency to treat cognitive and bodily events as separate constituents of emotion. Thus the cognitive aspects of emotion are supposedly distinct and separate from the bodily ones. This separation indicates that cognitivism’s disembodied conception of cognition continues to shape the way emotion theorists conceptualize emotion. (shrink)

We argue that theory-of-mind (ToM) approaches, such as “theory theory” and “simulation theory”, are both problematic and not needed. They account for neither our primary and pervasive way of engaging with others nor the true basis of our folk psychological understanding, even when narrowly construed. Developmental evidence shows that young infants are capable of grasping the purposeful intentions of others through the perception of bodily movements, gestures, facial expressions etc. Trevarthen’s notion of primary intersubjectivity can provide a theoretical (...) framework for understanding these capabilities and his notion of secondary intersubjectivity shows the importance of pragmatic contexts for infants starting around one year of age. The recent neuroscience of resonance systems (i.e., mirror neurons, shared representations) also supports this view. These ideas are worked out in the context of an embodied “Interaction Theory” of social cognition. Still, for more sophisticated intersubjective interactions in older children and adults, one might argue that some form of ToM is required. This thought is defused by appeal to narrative competency and the Narrative Practice Hypothesis (or NPH). We propose that repeated encounters with narratives of a distinctive kind is the normal route through which children acquire an understanding of the forms and norms that enable them to make sense of actions in terms of reasons. A potential objection to this hypothesis is that it presupposes ToM abilities. Interaction Theory is deployed once again to answer this by providing an alternative approach to understanding basic narrative competency and its development. (shrink)

Happiness, like other basic emotions, has visual properties that create the conditions for happiness to be perceived in others. This is to say that happiness is perceivable. Its visual properties are to be identified with those facial expressions that are characteristic of happiness. Yet saying that something is perceivable does not suffice for us to conclude that it is perceived. We therefore need to show that happiness is perceived. Empirical evidence suggests that the visual system functions to perceive (...) happiness as well as other basic emotions. Experiences that can be had simply by virtue of how the perceptual system functions are known as observations. I will thus argue that visual experiences in which we become aware of others’ happiness are observations. This approach will provide the necessary conceptual framework to show that we have perceptual knowledge of others’ happiness. (shrink)

I argue that there is no conflict between the simulation theory, once it is freed from certain constraints carried over from theory theory, and Gallagher's view that our primary and pervasive way of engaging with others rests on 'direct', non-mentalizing perception of the 'meanings' of others' facial expressions, gestures, and intentional actions.

Wittgenstein's contribution to musical aesthetics is not often discussed, which is surprising, given his rare musicality and musical connections. His distinctive achievement is to have focused on the question of musical understanding, and to have connected this with two other philosophical problems: the nature of the first-person case, and the understanding of facial expressions. Wittgenstein's third-person approach to philosophical psychology leads him to emphasize the role of performance in the understanding of music, and also to introduce an ‘intransitive’ (...) concept of expression. At times Wittgenstein seems to be arguing for an entirely non-relational account of musical meaning; however, a proper analysis of the first-person case shows that his theory of musical understanding might allow that, at some level, you understand a piece of music only if you imaginatively grasp the state of mind expressed by it. (shrink)

An analysis of the identity issues involved in facial allograft transplantation is provided in this paper. The identity issues involved in organ transplantation in general, under both theoretical accounts of personal identity and subjective accounts provided by organ recipients, are examined. It is argued that the identity issues involved in facial allograft transplantation are similar to those involved in organ transplantation in general, but much stronger because the face is so closely linked with personal identity. Recipients of (...) class='Hi'>facial allograft transplantation have the potential to feel that their identity is a mix between their own and the donor’s, and the donor’s family is potentially likely to feel that their loved one ‘‘lives on’’. It is also argued that facial allograft transplantation allows the recipients to regain an identity, because they can now be seen in the social world. Moreover, they may regain expressivity, allowing for them to be seen even more by others, and to regain an identity to an even greater extent. Informing both recipients and donors about the role that identity plays in facial allograft transplantation could enhance the consent process for facial allograft transplantation and donation. (shrink)

Shaun Gallagher and Dan Zahavi have recently argued against a simulationist interpretation of neural resonance. Recognizing intentions and emotions in the facial expressions and gestures of others may be subserved by e.g. mirror neuron activity, but this does not mean that we first experience an intention or emotion and then project it onto the other. Mirror neurons subserve social cognition, according to Gallagher and Zahavi, by being integral parts of processes of enactive social perception. I argue that the (...) notion of enactive social perception does not yet explain why social perception is subserved by mirroring. I also argue that this problem cannot be avoided by means of an appeal to multiple realization. Instead, I propose a holistic model of neural resonance-based social cognition that does give an explanatory role to mirroring by allowing for a partial experiential overlap between experiencing and recognizing emotions and intentions. This account avoids the simulationist step-wise conception of social cognition and recognizes the qualitative difference between first- and third-person emotion and intention attribution. It does capture too much of the simulationist intuitions, however, to warrant the label ‘social perception’. (shrink)

For many years, emotion theory has been characterized by a dichotomy between the head and the body. In the golden years of cognitivism, during the 1960s and ’70s, emotion theory focused on the cognitive antecedents of emotion, the so-called “appraisal processes.” Some saw bodily events largely as by-products of cognition, and as too unspecifi c to contribute to the variety of emotion experience. Cognition was conceptualized as an abstract, intellectual, “heady” process separate from bodily events. Although current emotion theory has (...) moved beyond this disembodied stance by conceiving of emotions as involving both cognitive processes (e.g., perception, attention, and evaluation) and bodily events (e.g., arousal, behavior, and facial expressions), the legacy of cognitivism persists in the tendency to treat cognitive and bodily events as separate constituents of emotion. Th us, the cognitive aspects of emotion are supposedly distinct and separate from the bodily ones. Th is separation indicates that cognitivism’s disembodied conception of.. (shrink)

Mindreading is the ability to attribute mental states to other individuals. According to the Theory-Theory (TT), mindreading is based on one's possession of a Theory of Mind. On the other hand, the Simulation Theory (ST) maintains that one arrives at the attribution of a mental state by simulating it in one's own mind. In this paper, I propose a ST-TT hybrid model of the ability to attribute disgust on the basis of visual stimuli such as facial expressions, body (...) postures, etc. More precisely, while I defend Goldman's (2006) thesis that the ability to attribute disgust based on observing disgusted facial expressions stems from a mirror-based simulation process, I argue that ST is unable to account for the ability to attribute disgust based on non-facial visual stimuli; I propose, rather, that this latter ability is theory-based. My model is grounded in evidence from individuals suffering from Huntington's Disease. (shrink)

The world perceived by a person undergoing vision without inversion of the retinal image has traditionally been described as inverted. Drawing on the philosophical work of Maurice Merleau-Ponty and the empirical research of Hubert Dolezal, I argue that this description is more reflective of a representationist conception of vision than of actual visual experience. The world initially perceived in vision without inversion of the retinal image is better described as lacking in lived significance rather than inverted; vision without inversion of (...) the retinal image affects the very content of the perceived world, including, importantly, its expressions and conducts, and not merely the orientation of this content. Moreover, I argue that the enactive approach, rather than a representationist approach, is best able to account for the perception of the world, after prolonged vision without inversion of the retinal image, as both normal and upright, yet still different from the world seen previously. Finally, in their attention to the perception of other people’s facial expressions, I argue that Merleau-Ponty and Dolezal draw out the existential significance of the enactive approach. In encountering another person, the most pressing task is generally not to observe this person’s features but, instead, to engage with this person’s expressions. (shrink)

We question whether empathy is mediated by a unitary circuit. We argue that recent neuroimaging data indicate dissociable neural responses for different facial expressions as well as for representing others' mental states (Theory of Mind, TOM). We also argue that the general empathy disorder considered characteristic of autism and psychopathy is not general but specific for each disorder.

Change blindness—our inability to detect changes in a stimulus—occurs even when the change takes place gradually, without any disruption (Simons et al., 2000). Such gradual changes are more difficult to detect than changes that involve a disruption. Using this method, David et al. (in press) recently showed substantial blindness to changes that involve facial expressions of emotion. In this experiment, we show that people who failed to detect any change in the displays were (1) nevertheless influenced by the (...) changing information in subsequent recognition decisions about which facial expression they had seen, and (2) that their confidence in their decisions was lower after exposure to changing vs. static displays. The findings therefore support the notion that undetected changes that occur in highly salient stimuli may be causally efficacious and influence subsequent behaviour. Implications concerning the nature of the representations associated with undetected changes are discussed. (shrink)

Cellular, or mobile phones are great: they allow people to communicate over long distances whenever and wherever they are, and instantaneously at that when the one called is wearing one too. Having said that, though, it must immediately be added that they, also, have a complex disadvantage, and it is one we are hard pushed to understand. In fact, due to its complexity people simply tend to neglect it, even though everyone in his right mind has had experience with it. (...) Now Walter Benjamin defined aura as “a distance however close it may be”.1) This has standardly been interpreted as a characterisation of an experience of presence, also by Benjamin. This aura supposedly suffered from the rise of photography. Aura can, also, be understood as inertia, the absence of something present. And whether aura is gone or widespread I gladly leave to more speculative-minded thinkers. I submit that we experience a person’s “aura”—her distance however close she may be—when perception tells us the person is present yet our mind realises that she isn’t. I am referring here to the observation had of another person engaged in a cell phone conversation. The inertia of the cell phone caller consists in her incapacity to address those who observe her. I think there is an immoral streak to her selfappointed moral autonomy. In a previous edition of this Dutch-Russian exchange on inertia I argued that our trafficking with facial expressions forms the model with which we’d best understand the workings of art—facial expression is the anthropological foundation of art. My discussion, today, of the cell phone conversation is meant to add to that previous suggestion. (shrink)

In Being and Nothingness Jean-Paul Sartre contends that the self's fundamental relation with the other is one of inescapable conflict. I argue that the research of the last few decades on the ability of infants - even newborns - to imitate the facial expressions and gestures of adults provides counter-evidence to Sartre's claim. Sartre is not wrong that the look of the other may be a source of self-alienation, but that is not how it functions in the first (...) instance. An earlier and more primary form of looking with and at the other is a source of self-discovery. In early imitation, the infant and adult each see the other not as objects of experience but as subjects of action. Such looking is necessary for the infant to realize its own potential as a self-conscious, goal-directed subject of perception and action. (shrink)

Arbib suggests that language emerged in direct relation to manual gestural communication, that Broca's area participates in producing and imitating gestures, and that emotional facial expressions contributed to gesture-language coevolution. We discuss functional and structural evidence supporting localization of the neuronal modules controlling limb praxis, speech and language, and emotional communication. Current evidence supports completely independent limb praxis and speech/language systems.

We propose that the fine discrete movements of the tongue as used in speech are what account for the extreme lateralization in humans, and that handedness is a mere byproduct of tongue use. With regard to syntax, we support the Armstrong et al. (1995) proposition that syntax derives directly from gestural motor movements as opposed to facial expressions.

Patients with behavioral variant of frontotemporal dementia (FTD) have difficulties recognizing facial emotions, a deficit that may contribute to their impaired social skills. In three experiments, we investigated the FTD deficit in recognition of facial emotions, by comparing six patients with impaired social conduct, nine Alzheimer’s patients, and 10 age-matched healthy adults. Experiment 1 revealed that FTD patients were impaired in the recognition of negative facial emotions. Experiment 2 replicated these findings when participants had to determine whether (...) two faces were expressing the same or different emotions. Experiment 3 was a control study in which participants had to discriminate whether two faces were of the same sex. In this non-emotional processing task, both patient groups performed worse than normal participants, but FTD patients performed as well as Alzheimer’s patients. We conclude that FTD patients are impaired in the recognition of negative facial emotions. © 2005 Elsevier Ltd. All rights reserved. (shrink)

The present study investigates whether people can infer the preferences of others from spontaneous facial expressions alone. We utilize a paradigm that unobtrusively records people's natural facial reactions to relatively mundane stimuli while they simultaneously report which ones they find more appealing. Videos were then presented to perceivers who attempted to infer the choices of the target individuals—thereby linking perceiver inferences to objective outcomes. Perceivers demonstrated above-chance ability to infer target preferences across four different stimulus categories: people (...) (attractiveness), cartoons (humor), paintings (decorative appeal), and animals (cuteness). While perceivers' subjective ratings of expressivity varied somewhat between targets, these ratings did not predict the relative “readability” of the targets. The findings suggest that noncommunicative, natural facial behavior by itself suffices for certain types interpersonal prediction, even in low-emotional contexts. (shrink)

In this paper, I consider an argument offered by Hopkins (1988) regarding the nature and status of our everyday inferences from other people’s behavior to their motives and other mental states. (It may be that we recognize, rather than infer, immediate intentions and emotional states, for example, in bodily actions and facial expressions. But I am concerned with inferences that go beyond states that can be recognized immediately in this way.) Hopkins’ argument seeks to rebut the charge, leveled (...) by Grünbaum, that psychoanalysis cannot justify its inferences regarding motives using its own (clinical) methodology. Hopkins and Grünbaum agree that inferences to motives are causal inferences. Grünbaum argues that only .. (shrink)

J.S. Mill has formulated a classical statement of the "argument from analogy� concerning knowledge of other minds: "I must either believe them [other human beings] to be alive, or to be automatons� (Mill 1872, 244). It is possible that Wittgenstein had this in mind when writing the following: "I believe he is suffering.�—Do I also believe that he isn"t an automaton? It would go against the grain to use the word in both connexions. (Or is it like this: I believe (...) he is suffering, but am certain the he is not an automaton? Nonsense!) Suppose I say of a friend: "He isn"t an automaton�.—What information is conveyed by this, and to whom would it be information? To a human being who meets him in ordinary circumstances? What information could it give him? (At the very most that this man always behaves like a human being, and not occasionally like a machine.) "I believe he is not an automaton�, just like that, so far makes no sense. My attitude towards him is an attitude towards a soul [eine Einstellung zur Seele]. I am not of the opinion that he has a soul. (PI p. 178) Here Wittgenstein contrasts opinion (Meinung) and attitude (Einstellung). How should this contrast be understood? On a view such as Mill"s, to regard someone as a conscious being is to hold certain beliefs about him, beliefs that can perhaps ultimately be grounded in a theory of some sort. To have an "attitude towards a soul� is, on the contrary, to see a person"s gestures and facial expressions as "filled with meaning�. We have an attitude towards a soul when confronted with a person, which means that we react to his presence and behaviour in a certain way. (shrink)

Change blindness—our inability to detect changes in a stimulus—occurs even when the change takes place gradually, without any disruption (Simons et al., 2000). Such gradual changes are more difficult to detect than changes that involve a disruption. Using this method, David et al. (in press) recently showed substantial blindness to changes that involve facial expressions of emotion. In this experiment, we show that people who failed to detect any change in the displays were (1) nevertheless influenced by the (...) changing information in subsequent recognition decisions about which facial expression they had seen, and (2) that their confidence in their decisions was lower after exposure to changing vs. static displays. The findings therefore support the notion that undetected changes that occur in highly salient stimuli may be causally efficacious and influence subsequent behaviour. Implications concerning the nature of the representations associated with undetected changes are discussed. (shrink)

Evolutionary explanations of pain expression require modeling social adaptations in a context where the role of health professionals as potential caregivers, conflicts with their status as relative strangers. As signals of help elicitation or of alarm, facial pain displays and responses to displays, particularly in the upper face, are expected to conform to this evolutionarily novel clinical context.

This paper aims to study the role of the social robot Probo in providing assistance to a therapist for robot assisted therapy (RAT) with autistic children. Children with autism have difficulties with social interaction and several studies indicate that they show preference toward interaction with objects, such as computers and robots, rather than with humans. In 1991, Carol Gray developed Social Stories, an intervention tool aimed to increase children's social skills. Social stories are short scenarios written or tailored for autistic (...) individuals to help them understand and behave appropriately in social situations. This study shows that, in specific situations, the social performance of autistic children improves when using the robot Probo, as a medium for social story telling, than when a human reader tells the stories. The robot tells Social Stories to teach ASD children how to react in situations like saying “hello“, saying “thank you“ and “sharing toys“. The robot has the capability of expressing emotions and attention via its facial expressions and its gaze. The paper discusses the use of Probo as an added-value therapeutic tool for social story telling and presents the first experimental results. Keywords: social robot; ASD children; social story; robot assisted therapy. (shrink)

What do we see when we look at someone's expression of fear? I argue that one of the things that we see is fear itself. I support this view by developing a theory of affect perception. The theory involves two claims. One is that expressions are patterns of facial changes that carry information about affects. The other is that the visual system extracts and processes such information. In particular, I argue that the visual system functions to detect the (...) affects of others when they are expressed in the face. I develop my theory by drawing on empirical data from psychology and brain science. Finally, I outline a theory of the semantics of affect perception. (shrink)

The question is how to explain expressions of emotion. It is argued that not all expressions of emotion are open to the same sort of explanation. Those expressions which are actions can be explained, like other sorts of action, by reference to a belief and a desire; however, no genuine expression of emotion is done as a means to some further end. Certain expressions of emotion which are actions can also be given a deeper explanation as (...) being expressive of a wish. Expressions of emotion which are not actions cannot be given a belief-desire explanation: no belief is involved, and a desire is involved only in an honorific sense of 'desire'. The distinction amongst expressions of emotion between those which are actions and those which are not is not a precise one, and the paper concludes with some speculative remarks about borderline cases such as jumping for joy. (shrink)

The extended mind thesis (EM) asserts that some cognitive processes are (partially) composed of actions consisting of the manipulation and exploitation of environmental structures. Might some processes at the root of social cognition have a similarly extended structure? In this paper, I argue that social cognition is fundamentally an interactive form of space management—the negotiation and management of ‘‘we-space”—and that some of the expressive actions involved in the negotiation and management of we-space (gesture, touch, facial and whole-body expressions) (...) drive basic processes of interpersonal understanding and thus do genuine social-cognitive work. Social interaction is a kind of extended social cognition, driven and at least partially constituted by environmental (non-neural) scaffolding. Challenging the Theory of Mind paradigm, I draw upon research from gesture studies, developmental psychology, and work on Moebius Syndrome to support this thesis. (shrink)

I examine the phenomenological philosophies of Merleau-Ponty and Sartre as possible responses to contemporary studies of interpersonal relatedness in cognitive science, especially the experimental studies of infant's imitating simple facial gestures of adults. I discuss the implications and the challenges raised by the experimental studies to the dominant phenomenological accounts of intersubjectivity, but also envision how phenomenology may help to interpret the findings about infantile imitation in ways that favor the embodied perceptual connectedness between the self and the other, (...) without recourse to the inner private mind postulate endorsed by the theory of mind and shared by the experimental researchers of imitation. (shrink)

Mitchell S. Green presents a systematic philosophical study of self-expression - a pervasive phenomenon of the everyday life of humans and other species, which has received scant attention in its own right. He explores the ways in which self-expression reveals our states of thought, feeling, and experience, and he defends striking new theses concerning a wide range of fascinating topics: our ability to perceive emotion in others, artistic expression, empathy, expressive language, meaning, facial expression, and speech acts. He draws (...) on insights from evolutionary game theory, ethology, the philosophy of language, social psychology, pragmatics, aesthetics, and neuroscience to present a stimulating and accessible interdisciplinary work. (shrink)

The only obligatory temporal expression in English is tense, yet Hans Reichenbach (1947) has argued convincingly that the simplest sentence is understood in terms of three temporal notions. Additional possibilities for a simple sentence are limited: English sentences have one time adverbial each. It is not immediately clear how to resolve these matters, that is, how (if at all) Reichenbach's account can be reconciled with the facts of English. This paper attempts to show that they can be reconciled, and presents (...) an analysis of temporal specification that is based directly on Reichenbach's account.Part I is devoted to a study of the way the three times—speech time, reference time, event time—are realized and interpreted. The relevant syntactic structures and their interaction and interpretation are examined in detail. Part II discusses how a grammar should deal with time specification, and proposes a set of interpretive rules. The study offers an analysis of simple sentences, sentences with complements, and habitual sentences. It is shown that tense and adverbials function differently, depending on the structure in which they appear. The temporal system is relational: the orientation and values of temporal expressions are not fixed, but their relational values are consistent. This consistency allows the statement of principles of interpretation. (shrink)

Two competing intuitions have dominated the debate over facial tissue transplantation. On one side are those who argue that relieving the suffering of those with severe facial disfigurement justifies the medical risks and possible loss of life associated with this experimental procedure. On the other are those who say that there is little evidence to show that such transplants would have longterm psychological benefits that couldn’t be achieved by other means and that without clear benefits, the risk is (...) simply too great. Ethicists on both sides have called for more analysis of the link between the face and personal identity in order to get a better grasp on potential gains and losses. This paper responds to that call by looking at contemporary philosophical analyses of the relation between organ transplants and personal identity and between the human face, human dignity, and human vulnerability. It is argued that the face matters not because it is the unique marker of our identity, but because of its role in the intersubjective constitution of moral identity and human dignity. (shrink)

Drawing from the varieties of capitalism theoretical framework, the study explores the home country influences of multinational corporations (MNCs) on their corporate social responsibility (CSR) practices when they operate outside their national/regional institutional contexts. The study focusses on a particular CSR practice (i.e. corporate expressions of code of conducts) of seven MNCs from three varieties of capitalism – coordinated (2), mixed (2) and liberal (3) market economies – operating in the oil and gas sector of the Nigerian economy. The (...) study concludes that the corporate codes of conduct of these MNCs operating in Nigeria, to a large extent, reflect the characteristics of their home countries' model of capitalism, respectively, albeit with certain degree of modifications. The home countries' model of capitalism is also found to have implications for the degree of adaptability of these MNCs' CSR practices to the Nigerian institutional context – with the mixed market economy model of capitalism adapting more flexibly than the liberal and coordinated market economies, respectively. The findings of this study will contribute to the emerging literature on the institutional embeddedness of CSR practices in transnational social spaces, understanding of varieties of capitalism, and CSR in developing economies. (shrink)

This paper examines an hypothesis put forward by Pettit and Knobe 2009 to account for the Knobe effect. According to Pettit and Knobe, one should look at the semantics of the adjective “intentional” on a par with that of other gradable adjectives such as “warm”, “rich” or “expensive”. What Pettit and Knobe’s analogy suggests is that the Knobe effect might be an instance of a much broader phenomenon which concerns the context-dependence of normative standards relevant for the application of gradable (...) expressions. I adduce further evidence in favor of this view and go on to examine the predictions one obtains when assuming that “intentional” involves a two-dimensional scale, which implies evaluating how much an action or outcome is desired on the one hand, and how much it can be foreseen as a consequence of one’s actions on the other. (shrink)

What semantics should we attribute to mass expressions like "wisdom" and "love", which are derived from gradable expressions? We first examine how these expressions are used, then how they are interpreted in their various uses. We then propose a model to account for these data, in which derived mass nouns denote instances of properties.

This paper discusses the debate over whether emotional expressions are spontaneous or intentional actions. We describe a variety of empirical evidence supporting these two possibilities. But we argue that the spontaneous-intentional distinction fails to explain the psychological dynamics of emotional expressions. We claim that a complex systems perspective on intentions, as self-organized critical states, may yield a unified view of emotional expressions as a consequence of situated action. This account simultaneously acknowledges the embodied status of environment, evolution, (...) culture and mind in theories of emotion. (shrink)

This paper discusses the debate over whether emotional expressions are spontaneous or intentional actions. We describe a variety of empirical evidence supporting these two possibilities. But we argue that the spontaneous-intentional distinction fails to explain the psychological dynamics of emotional expressions. We claim that a complex systems perspective on intentions, as self-organized critical states, may yield a unified view of emotional expressions as a consequence of situated action. This account simultaneously acknowledges the embodied status of environment, evolution, (...) culture and mind in theories of emotion. (shrink)

Mathematicians and physical scientists depend heavily on the formal symbolism of mathematics in order to express and develop their theories. For this and other reasons the last hundred years has seen a growing interest in the nature of formal language and the way it expresses meaning; particularly the objective, shared aspect of meaning as opposed to subjective, personal aspects. This dichotomy suggests the question: do the objective philosophical theories of meaning offer concepts which can be applied in psychological theories of (...) meaning? In recent years cognitive scientists such as Chomsky [1980], Fodor [1981] and MacNamara [1982] have used philosophical approaches to the meaning of formal language expressions as the basis for their psychological theories. Following this lead it seems appropriate to review some of the main treatments of meaning with a view to their transferability. (shrink)

Children often refer to things ambiguously but learn not to from responding to clarification requests. We review and explore this learning process here. In Study 1, eighty-four 2- and 4-year-olds were tested for their ability to request stickers from either (a) a small array with one dissimilar distracter or (b) a large array containing similar distracters. When children made ambiguous requests, they received either general feedback or specific questions about which of two options they wanted. With training, children learned to (...) produce more complex object descriptions and did so faster in the specific feedback condition. They also tended to provide more information when requesting stickers from large arrays. In Study 2, we varied only distracter similarity during training and then varied array size in a generalization test. Children found it harder to learn in this case. In the generalization test, 4-year-olds were more likely to provide information (a) when it was needed because distracters were similar to the target and (b) when the array size was greater (regardless of need for information). We discuss how clear cues to potential ambiguity are needed for children to learn to tailor their referring expression to context and how several cues of heuristic value (e.g., more distracters > say more) can promote the efficiency of communication while language is developing. Finally, we consider whether it would be worthwhile drawing on the human learning process when developing algorithms for the production of referring expressions. (shrink)

previous theories and the relevance of those criticisms to the new accounts. Additionally, we have included a new section at the end, which gives some directions to literature outside of formal semantics in which the notion of mass has been employed. We looked at work on mass expressions in psycholinguistics and computational linguistics here, and we discussed some research in the history of philosophy and in metaphysics that makes use of the notion of mass.

It has been generally assumed that certain categories of numerical expressions, such as ‘more than n’, ‘at least n’, and ‘fewer than n’, systematically fail to give rise to scalar implicatures in unembedded declarative contexts. Various proposals have been developed to explain this perceived absence. In this paper, we consider the relevance of scale granularity to scalar implicature, and make two novel predictions: first, that scalar implicatures are in fact available from these numerical expressions at the appropriate granularity (...) level, and second, that these implicatures are attenuated if the numeral has been previously mentioned or is otherwise salient in the context. We present novel experimental data in support of both of these predictions, and discuss the implications of this for recent accounts of numerical quantifier usage. (shrink)

It seems a contradiction to hold of something both that it took a while and that no time elapsed or passed between its start and finish; there is a connection between the ideas of temporal extendedness and passage. The article develops this connection into a defense of the passage view of time and shows how without this sort of defense, conclusions of arguments putatively in support of the passage view may be reinterpreted as not in fact being expressions of (...) that view. (shrink)

Main Response Topics ? Introduction ? Open display and public evaluation ? Publicity versus patient privacy ? Facial tissue donation ? Validity of Louisville Instrument for Risk Acceptance ? Patients' understanding of risk ? Face versus hand transplantation ? Rejection rates/risks ? Patient compliance ? Exit strategy ? Functional recovery ? Societietal implications ? Psychological implications ? Conclusion: Uncertainty likely to persist.

This paper is an attempt to present disclosive ethics as a framework for computer and information ethics – in line with the suggestions by Brey, but also in quite a different manner. The potential of such an approach is demonstrated through a disclosive analysis of facial recognition systems. The paper argues that the politics of information technology is a particularly powerful politics since information technology is an opaque technology – i.e. relatively closed to scrutiny. It presents the design of (...) technology as a process of closure in which design and use decisions become black-boxed and progressively enclosed in increasingly complex socio-technical networks. It further argues for a disclosive ethics that aims to disclose the nondisclosure of politics by claiming a place for ethics in every actual operation of power – as manifested in actual design and use decisions and practices. It also proposes that disclosive ethics would aim to trace and disclose the intentional and emerging enclosure of politics from the very minute technical detail through to social practices and complex social-technical networks. The paper then proceeds to do a disclosive analysis of facial recognition systems. This analysis discloses that seemingly trivial biases in recognition rates of FRSs can emerge as very significant political acts when these systems become used in practice. (shrink)

A substantial amount of recent work in natural language generation has focused on the generation of ‘‘one-shot’’ referring expressions whose only aim is to identify a target referent. Dale and Reiter's Incremental Algorithm (IA) is often thought to be the best algorithm for maximizing the similarity to referring expressions produced by people. We test this hypothesis by eliciting referring expressions from human subjects and computing the similarity between the expressions elicited and the ones generated by algorithms. (...) It turns out that the success of the IA depends substantially on the ‘‘preference order’’ (PO) employed by the IA, particularly in complex domains. While some POs cause the IA to produce referring expressions that are very similar to expressions produced by human subjects, others cause the IA to perform worse than its main competitors; moreover, it turns out to be difficult to predict the success of a PO on the basis of existing psycholinguistic findings or frequencies in corpora. We also examine the computational complexity of the algorithms in question and argue that there are no compelling reasons for preferring the IA over some of its main competitors on these grounds. We conclude that future research on the generation of referring expressions should explore alternatives to the IA, focusing on algorithms, inspired by the Greedy Algorithm, which do not work with a fixed PO. (shrink)

The tradeoff hypothesis in the speech–gesture relationship claims that (a) when gesturing gets harder, speakers will rely relatively more on speech, and (b) when speaking gets harder, speakers will rely relatively more on gestures. We tested the second part of this hypothesis in an experimental collaborative referring paradigm where pairs of participants (directors and matchers) identified targets to each other from an array visible to both of them. We manipulated two factors known to affect the difficulty of speaking to assess (...) their effects on the gesture rate per 100 words. The first factor, codability, is the ease with which targets can be described. The second factor, repetition, is whether the targets are old or new (having been already described once or twice). We also manipulated a third factor, mutual visibility, because it is known to affect the rate and type of gesture produced. None of the manipulations systematically affected the gesture rate. Our data are thus mostly inconsistent with the tradeoff hypothesis. However, the gesture rate was sensitive to concurrent features of referring expressions, suggesting that gesture parallels aspects of speech. We argue that the redundancy between speech and gesture is communicatively motivated. (shrink)

The paper articulates and defends the view that paired structures of mentally 'represented' phonological and semantic features should, for all theoretical purposes, replace the notions of proposition and sentence. Following Chomsky, I refer to such pairs as expressions (EXP). In the first part, I elaborate the notion of an EXP and contrast it with that of sentence/proposition. The paper's second part questions a range of considerations which putatively show that propositions are fundamental to our understanding of meaning and cognitive (...) attitudes. I argue that while these considerations are effective against the theoretical worth of sentences, as usually understood, they may be accommodated by the EXP-conception or otherwise eschewed. (shrink)

Sentences containing pronouns and indefinite noun phrases can be said toexpress open propositions, propositions which display gaps to be filled.This paper addresses the question what is the linguistic content ofthese expressions, what information they can be said to provide to ahearer, and in what sense the information of a speaker can be said tosupport their utterance. We present and motivate first order notions ofcontent, update and support. The three notions are each defined in acompositional fashion and brought together within (...) a single and coherentframework. (shrink)

What semantics should we attribute to mass expressions like "wisdom" and "love", which are derived from gradable expressions? We first examine how these expressions are used, then how they are interpreted in their various uses. We then propose a model to account for these data, in which derived mass nouns denote instances of properties.

Transplantation continues to push the frontiers of medicine into domains that summon forth troublesome ethical questions. Looming on the frontier today is human facial transplantation. We develop criteria that, we maintain, must be satisfied in order to ethically undertake this as-yet-untried transplant procedure. We draw on the criteria advanced by Dr. Francis Moore in the late 1980s for introducing innovative procedures in transplant surgery. In addition to these we also insist that human face transplantation must meet all the ethical (...) requirements usually applied to health care research. We summarize the achievements of transplant surgery to date, focusing in particular on the safety and efficacy of immunosuppressive medications. We also emphasize the importance of risk/benefit assessments that take into account the physical, aesthetic, psychological, and social dimensions of facial disfiguration, reconstruction, and transplantation. Finally, we maintain that the time has come to move facial transplantation research into the clinical phase. (shrink)

We present a preliminary study on disambiguation of symbolic expressions in mathematical documents. We propose to use the natural language within which the expressions are embedded to resolve their semantics. The approach is based on establishing a similarity between the expression’s discourse context and a set of terms from Term Clusters based on OpenMath Content Dictionaries. The Term Clusters are semi-automatically constructed terminological resources which classify related mathematical concepts into groups. Each group is labelled with a term which (...) represents the common denominator between the concepts. (shrink)

This article offers a survey of computational research on referring expressions generation (REG). It introduces the REG problem and describes early work in this area, discussing what basic assumptions lie behind it, and showing how its remit has widened in recent years. We discuss computational frameworks underlying REG, and demonstrate a recent trend that seeks to link up REG algorithms with well-established Knowledge Representation traditions. Considerable attention is given to recent efforts at evaluating REG algorithms and the lessons that (...) they allow us to learn. The article concludes with a discussion of the way forward in REG, focussing on references in larger and more realistic settings. (shrink)

This paper presents a Conceptual Graph (CG) framework to the Generation of Referring Expressions (GRE). Employing Conceptual Graphs as the underlying formalism allows a rigorous, semantically rich, approach to GRE. A number of advantages over existing work are discussed. The new framework is also used to revisit existing complexity results in a fully rigorous way, showing that the expressive power of CGs does not increase the theoretical complexity of GRE.

A fundamental part of the process of referring to an entity is to categorise it (for instance, as the woman). Where multiple categorisations exist, this implicitly involves the adoption of a conceptual perspective. A challenge for the automatic Generation of Referring Expressions is to identify a set of referents coherently, adopting the same conceptual perspective. We describe and evaluate an algorithm to achieve this. The design of the algorithm is motivated by the results of psycholinguistic experiments.

Recent discussion of the meaning contribution of focus centered around the question of how focus information is integrated into semantic and pragmatic interpretation. One type of theory assumes that certain operators can make direct use of focus information. These theories stipulate that focus-sensitive operators like only or even, quantificational adverbials, and reason clauses have to be associated with a focus in their scope. Such “association with focus” theories have been proposed, for example, by Jackendoff (1972), Jacobs (1983), Rooth (1985), von (...) Stechow (1990) and Krifka (1992). More recently, Rooth (1992) has proposed that focus contributes in a more indirect way to the interpretation of these operators. Rooth argued that the quantificational domain of such operators is fixed by contextual factors, and that these contextual factors in turn are influenced by focus. More specifically, focus is seen as a device that introduces and regulates contextual variables that are then taken up by certain operators. One important argument for the contextual account of focus is that it does not have to stipulate focus in certain cases, namely socalled “second occurrence expressions”, in which there is little, if any, phonological evidence for it. (shrink)

In the social world, multiple sensory channels are used concurrently to facilitate communication. Among human and nonhuman pri- mates, faces and voices are the primary means of transmitting social signals (Adolphs, 2003; Ghazanfar and Santos, 2004). Primates recognize the correspondence between species-specific facial and vocal expressions (Massaro, 1998; Ghazanfar and Logothetis, 2003; Izumi and Kojima, 2004), and these visual and auditory channels can be integrated into unified percepts to enhance detection and discrimination. Where and how such communication signals (...) are integrated at the neural level are poorly understood. In particular, it is unclear what role “unimodal” sensory areas, such as the auditory cortex, may play. We recorded local field potential activity, the signal that best correlates with human imaging and event-related potential signals, in both the core and lateral belt regions of the auditory cortex in awake behaving rhesus monkeys while they viewed vocalizing conspecifics. We demonstrate unequivocally that the primate auditory cortex integrates facial and vocal signals through enhancement and suppression of field potentials in both the core and lateral belt regions. The majority of these multisensory responses were specific to face/voice integration, and the lateral belt region shows a greater frequency of multisensory integration than the core region. These multisensory processes in the auditory cortex likely occur via recip- rocal interactions with the superior temporal sulcus. (shrink)

This paper presents two cognitive models that simulate the production of referring expressions in the iMAP task—a task-oriented dialog. One general model is based on Dale and Reiter’s (1995)incremental algorithm, and the other is a simple template model that has a higher correlation with the data but is specifically geared toward the properties of the iMAP task. The property of the iMAP task environment that is modeled here is that the color feature is unreliable for identifying referents while other (...) features are reliable. The low computational cost of the incremental algorithm for generating referring expressions makes it an interesting starting point for a cognitive model. However, its explanatory power is limited, because it generates uniquely distinguishing referring expressions and because it considers features for inclusion in the referring expression in a fixed order. The first model extends the original incremental algorithm by an ability to adapt to feedback of whether a referring expression was used successfully, but it seems to overpredict the frequency with which distinguishing expressions are made and underpredict the frequency of overspecified referring expressions. The second model produces features for referring expressions purely based on its current estimate of a feature’s utility. Both models predict the observed human behavior of decreasing use of color terms and increasing use of useful feature terms. (shrink)