Contemporary literature on consciousness, with some exceptions, rarely considers the olfactory system. In this article the characteristics of olfactory consciousness, viewed from the standpoint of the phenomenal /access distinction, are examined relative to the major senses. The review details several qualitative differences in both olfactory P consciousness and A consciousness . The basis for these differences is argued to arise from the functions that the olfactory system performs and from the unique neural architecture needed to instantiate them. These data suggest, (...) at a minimum, that P and A consciousness are uniquely configured in olfaction and an argument can be made that the P and A distinction may not hold for this sensory system. (shrink)

We investigate how the perceived uncertainty of a conditional affects a person's choice of conclusion. We use a novel procedure to introduce uncertainty by manipulating the conditional probability of the consequent given the antecedent. In Experiment 1, we show first that subjects reduce their choice of valid conclusions when a conditional is followed by an additional premise that makes the major premise uncertain. In this we replicate Byrne. These subjects choose, instead, a qualified conclusion expressing uncertainty. If subjects are given (...) a third statement that qualifies the likelihood of the additional premise, then the uncertainty of the conclusions they choose is systematically related to the suggested uncertainty. Experiment 2 confirms these observations in problems that omit the additional premise and qualify the first premise directly. Experiment 3 shows that the qualifying statement also affects the perceived probability of the consequent given the antecedent of the conditional. Experiment 4 investigates the effect of suggested uncertainty on the fallacies and shows that increases in uncertainty reduce the number of certain conclusions that are chosen while affirming the consequent but have no effect on denying the antecedent. We discuss our results in terms of rule theories and mental models and conclude that the latter give the most natural account of our results. (shrink)

There have been few tests of whether exposure to naturalistic or experimental disease-threat inductions alter disgust sensitivity, although it has been hypothesized that this should occur as part of disgust’s disease avoidance function. In the current study, we asked Macquarie university students to complete measures of disgust sensitivity, perceived vulnerability to disease, hand hygiene behavior and impulsivity, during Australia’s Covid-19 pandemic self-quarantine period, in March/April 2020. These data were then compared to earlier Macquarie university, and other local, and overseas student (...) cohorts, to determine if disgust sensitivity and the other measures, were different in the lockdown sample. The most consistent finding in the lockdown sample was of higher core disgust sensitivity, with some evidence of greater germ aversion on the PVD, and an increase in hand and food-related hygiene, but with little change in impulsivity. The consistency with which greater core disgust sensitivity was observed, suggests exposure to a highly naturalistic disease threat is a plausible cause. Greater disgust sensitivity may have several functional benefits and may arise implicitly from the threat posed by the Covid-19 pandemic. (shrink)

Four experiments investigated uncertainty about a premise in a deductive argument as a function of the expertise of the speaker and of the conversational context. The procedure mimicked everyday reasoning in that participants were not told that the premises were to be treated as certain. The results showed that the perceived likelihood of a conclusion was greater when the major or the minor premise was uttered by an expert rather than a novice (Experiment 1). The results also showed that uncertainty (...) about the conclusion was higher when the major premise was uttered by a novice and an alternative premise by an expert, compared to when the major premise was uttered by an expert and the alternative by a novice (Experiment 2). Similarly, the believability of a conclusion was considerably lower when the minor premise was uttered by a novice and denied by an expert, as opposed to when an expert uttered the minor premise and a novice denied it (Experiment 3). Experiment 4 showed that the nature of the uncertainty induced by a denial of the minor premise depended on whether or not the context was a conversation. These results pose difficult problems for current theories of reasoning, as current theories are based on the results of experiments in which the premises are treated as certain. Our discussion of the results emphasises the importance of pragmatics in reasoning, namely, the role of general knowledge about the world in assessing the probability of a premise uttered by an expert or a novice and the role of interpretations of the premise based on pragmatic inferences in revising these initial probabilities. (shrink)

It has been suggested that there maybe no olfactory illusions. This manuscript examines this claim and argues that it arises because olfactory illusions are not typically accompanied by an awareness of their illusory nature. To demonstrate that olfactory illusions do occur, the relevant empirical literature is reviewed, by examining instances of where the same stimulus results in different percepts, and of where different stimuli result in the same percept. The final part of the manuscript evaluates the evidence favoring the existence (...) of olfactory illusions, and then examines why they may not typically be accompanied by awareness. Three contributory mechanisms are discussed, relating to difficulty of verification and paucity of olfactory knowledge, the role of change blindness, and restricted access consciousness in this sense. (shrink)

This paper examines the applicability of the object concept to the chemical senses, by evaluating them against a set of criteria for object-hood. Taste and chemesthesis do not generate objects. Their parts, perceptible from birth, never combine. Orthonasal olfaction (sniffing) presents a strong case for generating objects. Odorants have many parts yet they are perceived as wholes, this process is based on learning, and there is figure-ground segregation. While flavors are multimodal representations bound together by learning, there is no functional (...) need for flavor objects in the mouth. Rather, food identification occurs prior to ingestion using the eye and nose, with the latter retrieving multimodal flavor objects via sniffing (e.g., sweet smelling caramel). While there are differences in object perception between vision, audition, and orthonasal olfaction, the commonalities suggest that the brain has adopted the same basic solution when faced with extracting meaning from complex stimulus arrays. (shrink)

The functional basis of disgust in disease avoidance is widely accepted; however, there is disagreement over what disgust is. This is a significant problem, as basic questions about disgust require...

Olfactory rivalry can occur when a binary mixture is sniffed repeatedly, with one percept dominating then the other. Experiment 1 demonstrated olfactory rivalry using several new techniques. Experiments 2 and 3 examined whether participants can notice rivalry. Participants received trials composed of odor pairs: either a mixture followed by the same mixture; or a pure odor followed by the same pure odor. On some trials participants judged whether the two stimuli were the same or different, to see if they could (...) detect rivalry. On other trials participants judged the quality of each odor, allowing us to determine whether rivalry occurred. We found evidence for rivalry when we compared reports of odor quality for one stimulus and then the other, but no evidence that participants could detect this change. These findings are consistent with the idea that people can experience olfactory illusions, but may not know they have occurred. (shrink)

We examined here whether people believe consumers of natural foods are more virtuous than consumers of unnatural foods. In Study One we asked student participants (n = 84; 77 female, M age = 19.5) to form an impression of another person based solely upon whether they ate natural or unnatural foods, these being determined in a pilot survey. On an open response format, participants reported more positive moral and health traits in consumers of natural foods. These findings were further confirmed (...) using rating-based evaluations. In Study Two we determined if this belief in the virtuousness of natural food consumers translated into behaviour. Student participants (n = 40; 25 female, M age = 20.2) played a trust game, exchanging tokens with a fictitious player. Incidental diet information about the fictitious player was provided, with participants in one group playing against a natural food consumer and those in another against an unnatural food consumer. Participants who played against a natural food consumer behaved as if they trusted this person more, and their performance on the game was predicted by how moral they felt the fictitious player was, but not by other attributes such as health. These findings suggest that people believe consumers of natural food are more virtuous, and we suggest this is driven by the altruistic attitudes that people believe to be associated with natural food consumption. (shrink)

This study forms part of a research project designed to test the sensing, intuition, feeling and thinking (SIFT) approach to biblical hermeneutics in respect of a wide range of biblical passages. On this occasion, two contrasting approaches to perceiving (a group of eight sensing types and a group of nine intuitive types) were invited to address two questions to John 21:1–12a: What do you see in this passage? What sparks your imagination in this passage? These two contrasting groups generated characteristically (...) different readings of the same text. Contribution: The SIFT approach to biblical hermeneutics is rooted in the reader-perspective school of interpretation and is concerned with identifying the influence of the psychological type profile of the reader on the interpretation of text. The present study adds to a developing body of evidence validating the theory underpinning the SIFT approach and does so by focusing for the first time on the resurrection appearance at the lakeside in John 21. (shrink)

Working within the sensing, intuition, feeling, thinking (SIFT) approach to biblical hermeneutics, the present study invited a hermeneutical community of 23 type-aware participants to explore the account of the Death of Lazarus as reported in John 11: 1–17 within type-alike groups differentiated according to the participants’ dominant function-orientation. Five groups were constituted differentiating: introverted sensing, introverted intuition, extraverted intuition, introverted and extraverted feeling and introverted and extraverted thinking. These five groups generated distinctive readings of the narrative that were characteristic of (...) the individual type preference. Contribution: The SIFT method, situated within the reader perspective approach to biblical hermeneutics, is concerned with attending to the influence exerted by the psychological type profile of the reader on interpreting the text. The present study goes beyond previous work by comparing the responses of five hermeneutical communities (each distinguished by a different dominant function-orientation) to the same passage of scripture. (shrink)

It has long been suspected that attentional processes differ between olfaction and the other senses. Here, we test whether voluntary dishabituation, seen, for example, when we re-attend to the ticking of a clock, can occur in olfaction. Participants were seated in an odorized room, where at various intervals they had to evaluate what they could smell. An experimental group had one nostril open and the other closed, except during the evaluations, so that the closed side was subject to centrally driven (...) habituation, but not peripheral adaptation. A control group had both nostrils closed except during evaluations. Following exposure, the experimental group could not report the room's odor in either the centrally habituated nostril or the nostril that remained open, while the control group could. This effect could result from a number of causes, including olfaction's unique neuroanatomy, functional constraints imposed by detecting volatile chemicals, and as a consequence of limited cortical resources, with implications for the functional value of consciousness. (shrink)

Several studies have reported impairment in the recognition of facial expressions of disgust in patients with Huntington's disease (HD) and preclinical carriers of the HD gene. The aim of this study was to establish whether impairment for disgust in HD patients extended to include the ability to express the emotion on their own faces. Eleven patients with HD, and 11 age and education matched healthy controls participated in three tasks concerned with the expression of emotions. One task assessed the spontaneous (...) production of disgust-like facial expressions during the smelling of offensive odorants. A second assessed the production of posed facial expressions during deliberate attempts to communicate emotion. The third task evaluated HD patients’ ability to imitate the specific facial configurations associated with each emotion. Foul odours induced fewer disgust-like facial reactions in HD patients than in controls, and patients’ posed facial expressions of disgust were less accurate than the posed disgust expressions of controls. The effect was selective to disgust; patients had no difficulty posing expressions of other emotions. These impairments were not explained by compromised muscle control: HD patients had no difficulty imitating the facial movements required to display disgust. Viewed together with evidence of difficulty in other aspects of disgust in HD, the findings suggest that a common substrate might participate in both the processing and the expression of this emotion. (shrink)

Howe, Davidson & Sloboda's focus on learning has important implications because the amount and quality of training are relevant to all learners, not just those acquiring exceptional abilities. In this commentary, I discuss learning goals as an indicator of learning quality, and suggest that all learners can be guided towards more effective learning by shifting their learning goals.

Working within the reader perspective approach to biblical hermeneutics, a series of empirical studies have tested the theory that the readers' psychological type preference between sensing and intuition shapes distinctive readings of biblical narratives. More recently, closer attention has also been given to differentiation within these two perceiving functions of sensing and intuition with regard to their introverted and extraverted orientation. Against this background, the present study examines the distinctive reading of the Johannine narrative of the wedding at Cana, a (...) passage rich in materials to engage the perceiving functions, by two groups whose dominant or auxiliary functions were introverted sensing and introverted intuition.CONTRIBUTION: Situated within the reader perspective approach to biblical hermeneutics, the sensing, intuition, feeling, thinking method is concerned with identifying the influence of the psychological type of the reader in shaping the interpretation of text. The foundations of the SIFT approach distinguish amongst the four functions of sensing, intuition, feeling and thinking. The present study builds on this foundation by introducing the nuance of the orientation in which the function is expressed, in this case focusing specifically on introverted sensing and introverted intuition. (shrink)

Bio-ontologies are essential tools for accessing and analyzing the rapidly growing pool of plant genomic and phenomic data. Ontologies provide structured vocabularies to support consistent aggregation of data and a semantic framework for automated analyses and reasoning. They are a key component of the Semantic Web. This paper provides background on what bio-ontologies are, why they are relevant to botany, and the principles of ontology development. It includes an overview of ontologies and related resources that are relevant to plant science, (...) with a detailed description of the Plant Ontology (PO). We discuss the challenges of building an ontology that covers all green plants (Viridiplantae). Key results: Ontologies can advance plant science in four keys areas: 1. comparative genetics, genomics, phenomics, and development, 2. taxonomy and systematics, 3. semantic applications and 4. education. Conclusions: Bio-ontologies offer a flexible framework for comparative plant biology, based on common botanical understanding. As genomic and phenomic data become available for more species, we anticipate that the annotation of data with ontology terms will become less centralized, while at the same time, the need for cross-species queries will become more common, causing more researchers in plant science to turn to ontologies. (shrink)

The Plant Ontology (PO) is a community resource consisting of standardized terms, definitions, and logical relations describing plant structures and development stages, augmented by a large database of annotations from genomic and phenomic studies. This paper describes the structure of the ontology and the design principles we used in constructing PO terms for plant development stages. It also provides details of the methodology and rationale behind our revision and expansion of the PO to cover development stages for all plants, particularly (...) the land plants (bryophytes through angiosperms). As a case study to illustrate the general approach, we examine variation in gene expression across embryo development stages in Arabidopsis and maize, demonstrating how the PO can be used to compare patterns of expression across stages and in developmentally different species. Although many genes appear to be active throughout embryo development, we identified a small set of uniquely expressed genes for each stage of embryo development and also between the two species. Evaluating the different sets of genes expressed during embryo development in Arabidopsis or maize may inform future studies of the divergent developmental pathways observed in monocotyledonous versus dicotyledonous species. The PO and its annotation databasemake plant data for any species more discoverable and accessible through common formats, thus providing support for applications in plant pathology, image analysis, and comparative development and evolution. (shrink)

In lieu of an abstract, here is a brief excerpt of the content:Philosophy of Music Education Review 12.1 (2004) 67-70 [Access article in PDF] Response to Mary J. Reichling, "Intersections: Form, Feeling, and Isomorphism" David Stevenson Vassalboro, Maine Mary J. Reichling's essay regarding the three concepts, form, feeling, and isomorphism, is lucid, well structured, and aptly supported by research of other music education philosophers. She states her purpose in the opening paragraph: "to examine and to elucidate various aspects of these (...) three concepts in her [Susanne Langer's] writing, as they are fundamental to an understanding of her aesthetic theory and to the construction of a philosophy of music and music education."A philosophy of music education must be the focus in all ensuing debate, and must remain of paramount importance. Arguments, especially dialectic arguments, are not won or lost; they merely strip away the outer garments until more and more of the truth is exposed. My thoughts regarding Reichling's essay are offered in this vein.Reichling amply makes the point that music is a dynamic moving form. She asserts that "Langer argues that form is not separable from content," clarifying further by saying that "By content Langer is designating the form's import or meaning." And she offers other examples of dynamic, moving forms, among them, "forms created by movements of clouds or fog through the mist and early light." [End Page 67]At this point, perhaps interjecting the notion of perception is in order. I would suggest that the cloud formations offer no content or meaning outside of the viewer's perceptions or imagination. Music (art), being the nebulous subject that it is, ensconced in subjectivity and steeped in perception, both interpersonal and intrapersonal at the same time, exists to be taken by individuals, each at his or her own level of accomplishment, understanding, and interest. Therefore, does the meaning inhere in the form, as Langer and Reichling assert, or is it assigned by the listener (in the case of music) or by the viewer (in the case of the cloud formation)? "If the doors of perception were cleansed every thing would appear to man as it is: infinite."1 William Blake's observation notwithstanding, the truth is that perception is the only thing that we have with which to view our existence. I believe that there is such a thing as absolute truth, and that reality does exist. However, we mere mortals lack the ability to view the world through anything other than our own perceptions. The knowledge or meaning gained through contemplation of the form is, in all likelihood, quite different for each observer.Likewise, imagination and conceptual ability play a role in interpreting what the senses have perceived. Langer, and by quotation, Reichling, offers the notion of a red dot placed on the rim of a spinning wheel that appears to the viewer as a red circle. "When the spinning stops, the form, the red circle, evaporates. Did it really exist? Does it have ontological status? Is it merely an illusion?" I asked my students to close their eyes and imagine a spinning wheel with a red dot placed on the rim. I asked them, "As the wheel spins, do you see the dot?" The answer was that they saw a red circle. Did they really see a red circle, or even a spinning wheel? Of course not, we were in a music classroom. Yet they were able to conceptualize or imagine the image, and I would suggest that that carries more weight in the realm of art than does actual ontological status.The problem with the experiment of the preceding paragraph is that "Langer argues that form is not separable from content, writing that it is not possible 'to divorce the logical form from its one embodiment or expression.'" In the subsequent paragraph Reichling states, When the music stops, when the ballet is concluded, when the play ends, when the wheel stops spinning, memory may remain but the content (content as meaning-my parenthetical interjection), the feeling, the red circle, the image the dancer created is gone. Is this illogical or has knowledge... (shrink)

Neonatal brain monitoring in the neonatal intensive care units requires a continuous review of the spontaneous cortical activity, i.e., the electroencephalograph background activity. This needs development of bedside methods for an automated assessment of the EEG background activity. In this paper, we present development of the key components of a neonatal EEG background classifier, starting from the visual background scoring to classifier design, and finally to possible bedside visualization of the classifier results. A dataset with 13,200 5-minute EEG epochs from (...) 27 infants with birth asphyxia was used for classifier training after scoring by two independent experts. We tested three classifier designs based on 98 computational features, and their performance was assessed with respect to scoring system, pre- and post-processing of labels and outputs, choice of channels, and visualization in monitor displays. The optimal solution achieved an overall classification accuracy of 97% with a range across subjects of 81–100%. We identified a set of 23 features that make the classifier highly robust to the choice of channels and missing data due to artefact rejection. Our results showed that an automated bedside classifier of EEG background is achievable, and we publish the full classifier algorithm to allow further clinical replication and validation studies. (shrink)

Birds are not commonly admired for emotional expression, and when they are, the focus is typically on negative states; yet vocal behavior is considered a direct reflection of an individual’s emotional state. Given that over 4000 species of songbird produce learned, complex, context-specific vocalizations, we make the case that songbirds are conspicuously broadcasting distinct positive emotional states and that hearing songs can also induce positive states in other birds. Studies are reviewed that demonstrate that that the production of sexually motivated (...) song reflects an emotional state of anticipatory reward-seeking (i.e., mate-seeking), while outside the mating context song in gregarious flocks reflects a state of intrinsic reward. Studies are also reviewed that demonstrate that hearing song induces states of positive anticipation and reward. This review brings together numerous studies that highlight a potentially important role for the songbird nucleus accumbens, a region nearly synonymous with reward in mammals, in positive emotional states that underlie singing behavior and responses to song. It is proposed that the nucleus accumbens is part of an evolutionarily conserved circuitry that contributes context-dependently to positive emotional states that motivate and reward singing behavior and responses to song. Neural mechanisms that underlie basic emotions appear to be conserved and similar across vertebrates. Thus, these findings in songbirds have the potential to provide insights into interventions that can restore positive social interactions disrupted by mental health disorders in humans. (shrink)

Recent magnetic resonance imaging and pathological studies have indicated that axonal loss is a major contributor to disease progression in multiple sclerosis. 1 H magnetic resonance spectroscopy, through measurement of N -acetyl aspartate, a neuronal marker, provides a unique tool to investigate this. Patients with primary progressive multiple sclerosis have few lesions on conventional MRI, suggesting that changes in normal appearing white matter, such as axonal loss, may be particularly relevant to disease progression in this group. To test this hypothesis (...) NAWM was studied with MRS, measuring the concentration of N -acetyl derived groups. Single-voxel MRS using a water-suppressed PRESS sequence was carried out in 24 patients with primary progressive multiple sclerosis and in 16 age-matched controls. Ratios of metabolite to creatine concentration were calculated in all subjects, and absolute concentrations were measured in 18 patients and all controls. NA/Cr was significantly lower in NAWM in patients than in controls, as was the absolute concentration of NA. There was no significant difference in the absolute concentration of creatine between the groups. This study supports the hypothesis that axonal loss occurs in NAWM in primary progressive multiple sclerosis and may well be a mechanism for disease progression in this group. (shrink)

Coexistence between livestock grazing and carnivores in rangelands is a major challenge in terms of sustainable agriculture, animal welfare, species conservation and ecosystem function. Many effective non-lethal tools exist to protect livestock from predation, yet their adoption remains limited. Using a social-ecological transformations framework, we present two qualitative models that depict transformative change in rangelands grazing. Developed through participatory processes with stakeholders from South Africa and the United States of America, the models articulate drivers of change and the essential pathways (...) to transition from routine lethal management of carnivores towards mutually beneficial coexistence. The pathways define broad actions that incorporate multiple values in grazing systems including changes to livestock management practices, financial support, industry capacity building, research, improved governance and marketing initiatives. A key finding is the new concept of ‘Predator Smart Farming’, a holistic and conscientious approach to agriculture, which increases the resilience of landscapes, animals and rural livelihoods. Implementation of these multiple pathways would lead to a future system that ensures thriving agricultural communities, secure livelihoods, reduced violence toward animals, and landscapes that are productive and support species conservation and coexistence. (shrink)