How is motion disparity integrated with binocular disparity in depth perception?

Two experiments presented motion disparity conflicting with binocular disparity to examine how these cues determined apparent depth order (convex, concave) and depth magnitude. In each experiment, 8 subjects estimated the depth order and depth magnitude. The first experiment showed the following. (1) The visual system used one of these cues exclusively in selecting a depth order for each display. (2) The visual system integrated the depth magnitude information from these cues by a weighted additive fashion if it selected the binocular disparity in depth order perception and if the depth magnitude specified by motion disparity was small relative to that specified by binocular disparity. (3) The visual system ignored the depth magnitude information of binocular disparity if it selected the motion disparity in depth order perception. The second experiment showed that these three points were consistent whether the subject’s head movement or object movement generated motion disparity.     

The duality of non-conceptual content in Husserl’s phenomenology of perception

Recently, a number of epistemologists have argued that there are no non-conceptual elements in representational content. On their view, the only sort of non-conceptual elements are components of sub-personal organic hardware that, because they enjoy no veridical role, must be construed epistemologically irrelevant. By reviewing a 35-year-old debate initiated by Dagfinn Følledal, I believe Husserlian phenomenology can be updated to offer an important contribution to this discussion. On my interpretation, what Husserl calls “hyletic data” may be read as that subjective quality of experience inarticulable as a propositional attitude – and, thus, hyletic data are non-conceptual. In anticipation of the recent conceptualist position, Føllesdal and his adherents argued that what Husserl had called “noema” or representational content is, however, entirely conceptual. A closer inspection of the relevant texts, however, reveals that Husserl admits non-conceptual elements into his characterization of the noema. If that is correct, then Husserl must have been a dualist about non-conceptual content. In turn, I believe what explains this dualism is a non-foundationalist reconstruction of Husserl’s phenomenological reduction.An earlier version of this paper was delivered at Fordham University on the occasion of the 33rd Annual Meeting of the Husserl Circle. I am grateful to Prof. Steven Crowell who, in his capacity as respondent, offered incisive and helpful commentary. I also thank Prof. John J. Drummond for organizing the meeting, and all those present during my talk; as well as two anonymous reviewers for Phenomenology and the Cognitive Sciences, who offered helpful questions and comments.     

The role of practice and habituation in Socrates’ theory of ethical development

ABSTRACT

The goal of this paper is to challenge the standard view that Socrates of the early Platonic dialogues is an intellectualist with respect to virtue. Through a detailed analysis of the educational theory laid out in the early dialogues, it will be argued that Socrates believes that the best way to cultivate virtues in his interlocutors is not to convince them of ethical truths by way of reason and argument alone, but to encourage them to participate in the practice of virtue. Habit and practice are essential to the cultivation of virtue because they mould the desires and dispositions of the agent and promote a kind of knowledge that cannot be achieved discursively – craft-knowledge. Only when agents have achieved craft-knowledge can they be counted on to act virtuously on every occasion; and craft-knowledge can only be achieved by way of practice and habituation.     

The twofold role of diagrams in Euclid’s plane geometry

Proposition I.1 is, by far, the most popular example used to justify the thesis that many of Euclid??s geometric arguments are diagram-based. Many scholars have recently articulated this thesis in different ways and argued for it. My purpose is to reformulate it in a quite general way, by describing what I take to be the twofold role that diagrams play in Euclid??s plane geometry (EPG). Euclid??s arguments are object-dependent. They are about geometric objects. Hence, they cannot be diagram-based unless diagrams are supposed to have an appropriate relation with these objects. I take this relation to be a quite peculiar sort of representation. Its peculiarity depends on the two following claims that I shall argue for: (i) The identity conditions of EPG objects are provided by the identity conditions of the diagrams that represent them; (ii) EPG objects inherit some properties and relations from these diagrams.     

The syllable’s role in word naming

In a series of experiments, the masked priming paradigm with very brief prime exposures was used to investigate the role of the syllable in the production of English. Experiment 1 (word naming task) showed a syllable priming effect for English words with clear initial syllable boundaries (such as BALCONY), but no effect with ambisyllabic words targets (such as BALANCE, where the /l/ belongs to both the first and the second syllables). Experiment 2 failed to show such syllable priming effects in the lexical decision task. Experiment 3 demonstrated that for words with clear initial syllable boundaries, naming latencies were faster only when primes formed the first syllable of the target, in comparison with a neutral condition. Experiment 4 showed that the two possible initial syllables of ambisyllabic words facilitated word naming to the same extent, in comparison with the neutral condition. Finally, Experiment 5 demonstrated that the syllable priming effect obtained for CV words with clear initial syllable boundaries (such as DIVORCE) was not due to increased phonological and/or orthographic overlap. These results, showing that the syllable constitutes a unit of speech production in English, are discussed in relation to the model of phonological and phonetic encoding proposed by Levelt and Wheeldon (1994).     

The role of inhibition in young children’s altruistic behaviour

By behaving altruistically, individuals voluntarily reduce their benefits in order to increase their partners’. This deviation from a self-interest-maximizing function may be cognitively demanding, though. This study investigates whether altruistic sharing in 4- to 6-year-old children, assessed by a dictator game (DG), is related to three measures of executive functioning, that is, inhibitory control, working memory, and cognitive flexibility. We found that children who turned out to be altruistic in the DG performed better on an inhibition task than non-altruists did. This finding lends support to the hypothesis that altruistic sharing might be somewhat constrained by the child’s ability to inhibit a natural tendency to preserve his or her own resources. Much research is needed to understand the role of inhibitory control in the development of costly sharing and the consolidation of inequity aversion.     

The role of “chirp” identification in duplex perception

Duplex perception occurs when the phonetically distinguishing transitions of a syllable are presented to one ear and the rest of the syllable (the “base”) is simultaneously presented to the other ear. Subjects report hearing both a nonspeech “chirp” and a speech syllable correctly cued by the transitions. In two experiments, we compared phonetic identification of intact syllables, duplex percepts, isolated transitions, and bases. In both experiments, subjects were able to identify the phonetic information encoded into isolated transitions in the absence of an appropriate syllabic context. Also, there was no significant difference in phonetic identification of isolated transitions and duplex percepts. Finally, in the second experiment, the category boundaries from identification of isolated transitions and duplex percepts were not significantly different from each other. However, both boundaries were statistically different from the category boundary for intact syllables. Taken together, these results suggest that listeners do not need to perceptually integrate F2 transitions or F2 and F3 transition pairs with the base in duplex perception. Rather, it appears that listeners identify the chirps as speech without reference to the base.     

The beholder’s share in the perception of orientation of 2-D shapes

A considerable amount of research demonstrates that people perceive cardinal orientations (horizontal and vertical) more accurately than other orientations; this is termed theoblique effect. We investigated the interaction of this effect with the degree of elongation of the stimulus. Our stimuli were ellipses with a wide range of aspect ratios, varying from a circle (aspect ratio = 1) to a line (aspect ratio = 123.5). The task was to set a probe line in the same orientation as the long axis of the ellipse. In our first experiment, we determined that performance is degraded as the aspect ratio decreases; furthermore, the bias and response variability are linearly related to a transformation of aspect ratio (roundness). We found significant individual differences; the results show high within-subjects correlations and low between-subjects correlations. In our second experiment, we had observers judge the orientation of circles randomly mixed in with ellipses of low aspect ratio. The observers demonstrated intrinsic preferences and generated reproducible distributions of orientation settings with idiosyncratic profiles. These distributions predict the influence on the response to ellipses with an aspect ratio higher than one and can be considered as thebeholder’s share in the perception of shape orientation.     

A cognitively-gated place? The role of need for closure in a biased perception of the place’s past

Biased memory of the past is often a starting point for intergroup conflicts. In three correlational studies, we examined the relationship between need for closure (NFC) and historical ethnocentric bias, a tendency to overestimate the role of one’s ethnic group in the multicultural history of the city of residence. In addition, we checked whether this relationship would be mediated by an individual preference for essentialist places. We found that higher NFC was related to increased historical ethnocentric bias. Moreover, this relation was mediated by preference for an essentialist type of a place. Our results may contribute to understanding the role of individual differences and preferred type of place in shaping a biased representation of the past. Furthermore, our research findings point to the importance of raising awareness of the multicultural past among high NFC individuals.

     

The physician’s role in the protection of human research subjects

Responsibility for the protection of human research subjects is shared by investigators, research ethics committees, sponsors/funders, research institutions, governments and, the focus of this article, physicians who enrol patients in clinical trials. The article describes the general principles of the patient-physician relationship that should regulate the participation of physicians in clinical trials and proposes guidelines for determining when and how such participation should proceed. The guidelines deal with the following stages of the trial: when first considering participation, when deciding whether to enrol patients, when asking patients to participate, when the trial is underway and when it is completed.     

The role of rapport in satisfying one’s basic psychological needs

Psychological need satisfaction is essential for daily human functioning and one of its sources is high quality interactions. Rapport is essential to high quality interactions and may be one way that various relationships types can provide the nutriments of healthy functioning. We hypothesized that when people perceive interactions to be higher in rapport, they will experience greater satisfaction of their needs for autonomy, competence, and relatedness. We also explored whether this would be a basic process that would be altered by the relationship between interactants, testing this with multiple operationalizations. We conducted an event-contingent diary study in which participants (n_participants?=?124) responded to items at baseline, each time they experienced an interaction (n_interaction?=?1293), and at two-week follow-up. Supporting hypotheses, rapport in interactions was positively associated with need satisfaction within-persons, between-persons, cross-sectionally, and when examining temporal change. Moreover, rapport tended to predict the satisfaction of one’s needs for competence, autonomy, and relatedness independently. Finally, relationships between interactants did not moderate these associations.

     

The concept of Lichnost’ in criminal law theory, 1860s–1900s

This essay discusses criminal law theories in late Imperial Russia. It argues that, although the political climate of Reform and Counter Reform effectively undermined attempts to implement new legislation premised on the idea of the ‘rights-enabled person’ (pravovaya lichnost’), paradoxically, it fostered the growth of juridical scholarship. Russian criminal law theorists engaged critically with Western juridical science, which, beginning in the 1870s, witnessed a shift away from absolutist theories inspired by the classics of philosophical idealism towards various strains of positivism arguing for the restoration of the person as a concrete, physiological being. However, while Russian scholars were drawn to these new trends of criminal anthropology and the sociology of crime, they were also obliged to take stock of an indigenous legal culture that scarcely differentiated between pravo and zakon, together with a long tradition of customary practices that equated crime and punishment with sin and redemption.     

Depiction and plastic perception. A critique of Husserl’s theory of picture consciousness

In this paper, I will present an argument against Husserl’s analysis of picture consciousness. Husserl’s analysis of picture consciousness (as it can be found primarily in the recently translated volume Husserliana 23) moves from a theory of depiction in general to a theory of perceptual imagination. Though, I think that Husserl’s thesis that picture consciousness is different from depictive and linguistic consciousness is legitimate, and that Husserl’s phenomenology avoids the errors of linguistic theories, such as Goodman’s, I submit that his overall theory is unacceptable, especially when it is applied to works of art. Regarding art, the main problem of Husserl’s theory is the assumption that pictures are constituted primarily as a conflict between perception/physical picture thing and imagination/picture object. Against this mentalist claim, I maintain, from a hermeneutic point of view, that pictures are the result of perceptual formations [Bildungen]. I then claim that Husserl’s theory fails, since it does not take into account what I call “plastic perception” [Bildliches Sehen], which plays a prominent role not only within the German tradition of art education but also within German art itself. In this connection, “plastic thinking” [Bildliches Denken] was prominent especially in Klee, in Kandinsky, and in Beuys, as well as in the overall doctrine of the Bauhaus. Ultimately, I argue that Husserl’s notion of picture consciousness and general perceptive imaginary consciousness must be replaced with a more dynamic model of the perception of pictures and art work that takes into account (a) the constructive and plastic moment, (b) the social dimension and (c) the genetic dimension of what it means to see something in something (Wollheim).

The role of social support in women’s health and recovery processes

The aim of this study was to assess the psychological state of women who have undergone surgery for breast cancer or cardiac surgery, including examination of the role of social support in both groups. The study included 48 women (mean age: 66.04?±?8.3 years). They were divided into two groups according to diagnosis: 23 women (mean age: 69.2?±?8.6 years) who underwent heart surgery (cardiac group, CG) and 25 women (mean age: 63.2?±?7.0 years) treated for breast cancer and associated with the Women After Mastectomy Club (oncology group, OG). In addition to the assessment of socio-demographic variables, the following self-report questionnaires were administered: Satisfaction with Life Scale, Acceptance of Illness Scale, Beck Depression Inventory, Spielberger State-Trait Anxiety Inventory as well as Berlin Social Support Scale. In the CG, the severity of depressive symptoms was two times higher than in OG (p?=?.003). In both groups, there was a high percentage (80%) of women with severe symptoms of anxiety (p?=?.37). In both groups, the level of life satisfaction was similar (p?=?.58), but OG was characterized by a higher level of acceptance of the disease (p?=?.003). The correlation analysis showed that in both groups, social support was related differently to the parameters of emotional state. Women treated for breast cancer were in a better mental condition than women treated for heart disease. The support coming from other women in similar circumstances (Women After Mastectomy Club) seems to be more effective than the support coming from the patient’s immediate environment. The results for social support ought to be interpreted not only through the prism of mean values of received support, but also with regard to the information on the sources of support.     

Sosa’s theory of knowledge

Synthese - This paper is a critical discussion of Ernest Sosa’s recent analysis of reflective knowledge.     

Does binocular disparity facilitate the detection of transparent motion?

Recent physiological studies have established that cortical cells that are tuned for the direction of motion may also exhibit tuning for binocular disparity. This tuning does not appear to provide any advantage in discriminating the direction of global motion in random-dot kinematograms. Here we investigated the possibility that this tuning may be important in the perception of transparent motion. Random-dot kinematograms were presented which contained coherent motion in a single direction or in two opposing directions. A greater proportion of signal dots was required for the detection of transparent motion than of motion in a single direction. This difference vanished when the two opposite directions of motion were presented with different disparities. These results suggest that the direction of global motion can be computed separately for surfaces which are clearly segregated in depth.