In this paper, missing attribute values in incomplete data sets have three possible interpretations: lost values, attribute-concept values and ‘do not care’ conditions. For rule induction, we use characteristic sets and generalized maximal consistent blocks. Therefore, we apply six different approaches for data mining. As follows from our previous experiments, where we used an error rate evaluated by ten-fold cross validation as the main criterion of quality, no approach is universally the best. Thus, we decided to compare our six approaches (...) using complexity of rule sets induced from incomplete data sets. We show that the smallest rule sets are induced from incomplete data sets with attribute-concept values, while the most complicated rule sets are induced from data sets with lost values. The choice between interpretations of missing attribute values is more important than the choice between characteristic sets and generalized maximal consistent blocks. (shrink)

In this paper incomplete data sets, or data sets with missing attribute values, have three interpretations, lost values, attribute-concept values and ‘do not care’ conditions. Additionally, the process of data mining is based on two types of probabilistic approximations, global and saturated. We present results of experiments on mining incomplete data sets using six approaches, combining three interpretations of missing attribute values with two types of probabilistic approximations. We compare our six approaches, using the error rate computed as a result (...) of ten-fold cross validation as a criterion of quality. We show that for some data sets the error rate is significantly smaller (5% level of significance) for lost values, for some data sets the smaller error rate is associated with attribute-concept values, and sometimes with ‘do not care’ conditions. Again, for some approaches the error rate is significantly smaller for saturated probabilistic approximations than for global probabilistic approximations, while for some approaches it is the other way around. Thus, for an incomplete data set, the best approach to data mining should be chosen by trying all six approaches. (shrink)

The emergence of shared symbol systems is considered to be a pivotal moment in human evolution and human development. These changes are normally explained by reference to changes in people's internal cognitive processes. We present 2 experiments which provide evidence that changes in the external, collaborative processes that people use to communicate can also affect the structure and organization of symbol systems independently of cognitive change. We propose that mutual‐modifiability—opportunities for people to edit or manipulate each other's contributions—is a key (...) constraint on the emergence of complex symbol systems. We discuss the implications for models of language development and the origins of compositionality. (shrink)

Healey et al. use experiments with chat dialogues to test the hypothesis that language co‐ordination is driven by ‘running repairs’. They replace signals of understanding such as “okay” with weaker, ‘spoof’ signals like “ummm”, and replace specific requests for clarification like “on the left?” with signals that suggest a higher degree of misunderstanding like “what?”. The latter manipulation causes participants to switch rapidly to more abstract forms of referring expression.

Healey et al. introduce the special issue with a brief overview of work on communication in the Cognitive Sciences and some of the historical and conceptual influences that have marginalized the study of miscommunication. Drawing on more recent work in Cognitive Science and Conversation Analysis they argue that miscommunication is in fact a highly structured, ubiquitous phenomenon that is fundamental to human interaction.

On July 27th, 2013, Sammy Yatim was shot and killed by Toronto Police Services’ Constable James Forcillo during a verbal confrontation on a streetcar as Yatim brandished a switchblade knife. Forcillo was charged, initially with second degree murder, and later attempted murder—a decision that confused media commentators as attempted murder is a lesser-and-included offense to second degree murder in Canadian law. In January 2016, Forcillo was found not guilty of second degree murder and guilty of attempted murder. Video evidence, recovered (...) from the streetcar’s onboard security cameras, was described by the presiding judge, Justice Edward Then, as proving beyond a reasonable doubt that Forcillo’s testimony was unreliable, especially in light of other evidence. This paper examines the use of video evidence to arrive at a ‘compromise verdict’ and the paradox of being convicted of attempting to murder someone who was killed. (shrink)

In this book, Patrick G. Stefan argues that the subversive message of resurrection was instrumental in Christianity’s expansion. Using Foucault’s analysis of how material conditions shape and create individual subjects, Stefan shows how the idea of resurrection undermined Caesar’s control over those living in his domain.

The author discusses the effects of contraception, which have borne out the predictions of Pope Paul VI's encyclical Humanae Vitae: the explosion of out-of-wedlock births, lack of respect for women, STD's, HIV/AIDS, etc. The overpopulation claims that fed the acceptance and promotion of contraception have been discredited by demographers; now the social costs of underpopulation are increasingly apparent. Acceptance of contraception has now also led to an embracing of morally objectionable technologies like cloning. This is the latest consequence of the (...) separation of sex and reproduction signaled by the acceptance of contraception. (shrink)

Social robots have limited social competences. This leads us to view them as depictions of social agents rather than actual social agents. However, people also have limited social competences. We argue that all social interaction involves the depiction of social roles and that they originate in, and are defined by, their function in accounting for failures of social competence.

Empirical evidence from dialogue, both corpus and experimental, highlights the importance of interaction in language use – and this raises some questions for Christiansen & Chater's proposals. We endorse C&C's call for an integrated framework but argue that their emphasis on local, individual production and comprehension makes it difficult to accommodate the ubiquitous, interactive, and defeasible processes of clarification and repair in conversation.

The interactive alignment model treats within- and between-individual co-ordination as essentially equivalent. It is argued that this leads to a conservative account of alignment that presupposes high levels of linguistic and conceptual co-ordination. Data from the maze task are used to argue that this approach is not sufficient to account for important co-ordination phenomena.

Despite its diminished importance amongst philosophers, the deductive-nomological framework is still important to contemporary behavioral scientists. Behavioral theorists operating within this framework must be careful to distinguish between nesting and chaining. Explanations are chained when the explanandum sentence of one explanation is one of the antecedent conditions of another. They are nested when one of the antecedent conditions or the explanandum sentence of one explanation is one of the covering laws of another. Confusion between nesting and chaining leads to explanation (...) nests that cannot be nomologically entrenched. They cannot, even in principle, be logically connected to laws arising from other sciences. This hazard should be particularly important for evolutionary psychologists to avoid, since many evolutionary psychologists tend to see themselves as dedicated to both nomological entrenchment and cognitive functionalist models. The hazard can be avoided if the intentional constructs of the behavioral sciences are construed not as ineffable and inaccessible antecedent conditions, but as complex, law-like patterns in behavior. (shrink)

Anecdotal evidence suggests that participants in conversation can sometimes act as a coalition. This implies a level of conversational organization in which groups of individuals form a coherent unit. This paper investigates the implications of this phenomenon for psycholinguistic and semantic models of shared context in dialog. We present a corpus study of multiparty dialog which shows that, in certain circumstances, people with different levels of overt involvement in a conversation, that is, one responding and one not, can nonetheless access (...) the same shared context. We argue that contemporary models of shared context need to be adapted to capture this situation. To address this, we propose “grounding by proxy,” in which one person can respond on behalf of another, as a simple mechanism by which shared context can accumulate for a coalition as a whole. We explore this hypothesis experimentally by investigating how people in a task-oriented coalition respond when their shared context appears to be weakened. The results provide evidence that, by default, coalition members act on each other's behalf, and when this fails they work to compensate. We conclude that this points to the need for a new concept of collective grounding acts and a corresponding concept of collective contexts in psycholinguistic and semantic models of dialog. (shrink)

McCabe & Healey argue that in patient‐psychiatrist interaction, the more the participants engage in repair, i.e., trying to fix potential misunderstandings, the better the outcomes of the interaction, as measured by treatment adherence and the quality of the Dr – patient relationship. This holds both for self‐repair, when psychiatrists fix their own utterances, as well as other‐repair, where patients try to fix the understanding displayed by the psychiatrist.

3 In live performances seated audiences have restricted opportunities for response. Some 4 responses are obvious, such as applause and cheering, but there are also many apparently 5 incidental movements including posture shifts, fixing hair, scratching and adjusting glasses. 6 Do these movements provide clues to people’s level of engagement with a performance? Our 7 basic hypothesis is that audience responses are part of a bi-directional system of audience- 8 performer communication. This communication is part of what distinguishes live from (...) recorded 9 performance and underpins live performers’ moment-to-moment sense of how well a performance 10 is going. Here we investigate the range of visible real-time movements of audiences in four live 11 contemporary dance performances. Video recordings of performers and audiences were analysed 12 using computer vision techniques for extracting face, hand and body movement data. The 13 meaning of audience movements were analysed by comparing clips of the audience at moments 14 of maximum and minimum movement to expert and novice judges. The results show that audience 15 clips with the lowest overall movement are judged as displaying the highest engagement. In 16 addition, we found that while there is no systematic relationship between audience and dancers 17 movement, hands seem to play an especially significant role since they move significantly more 18 compared to the rest of the body. We draw on these findings to argue that collective stillness is 19 an especially salient signal of audience engagement. (shrink)

The apparent incompatibility of mental states with physical explanations has long been a concern of philosophers of psychology. This incompatibility is thought to arise from the intentionality of mental states. But, Brentano notwithstanding, intentionality is an ordinary feature of higher order behavior patterns in the classical literature of ethology.

Striking similarities across ape gestural repertoires suggest shared phylogenetic origins that likely provided a foundation for the emergence of language. We pilot a novel approach for exploring possible semantic universals across human and nonhuman ape species. In a forced‐choice task, n = 300 participants watched 10 chimpanzee gesture forms performed by a human and chose from responses that paralleled inferred meanings for chimpanzee gestures. Participants agreed on a single meaning for nine gesture forms; in six of these the agreed form‐meaning (...) pair response(s) matched those established for chimpanzees. Such shared understanding suggests apes' (including humans') gesturing shares deep evolutionary origins. (shrink)