To pass or not to pass: More a question of body orientation than visual cues

This study investigated the influence of pitch body tilt on judging the possibility of passing under high obstacles in the presence of an illusory horizontal self-motion. Seated subjects tilted at various body orientations were asked to estimate the possibility of passing under a projected bar (i.e., a parking barrier), while imagining a forward whole-body displacement normal to gravity. This task was performed under two visual conditions, providing either no visual surroundings or a translational horizontal optic flow that stopped just before the barrier appeared. The results showed a main overestimation of the possibility of passing under the bar in both cases and most importantly revealed a strong influence of body orientation despite the visual specification of horizontal self-motion by optic flow (i.e., both visual conditions yielded a comparable body tilt effect). Specifically, the subjective passability was proportionally deviated towards the body tilt by 46% of its magnitude when facing a horizontal optic flow and 43% without visual surroundings. This suggests that the egocentric attraction exerted by body tilt when referring the subjective passability to horizontal self-motion still persists even when anchoring horizontally related visual cues are displayed. These findings are discussed in terms of interaction between spatial references. The link between the reliability of available sensory inputs and the weight attributed to each reference is also addressed.     

Face-specific capacity limits under perceptual load do not depend on holistic processing

Previous observations that face recognition may proceed automatically, without drawing on attentional resources, have been challenged by recent demonstrations that only a few faces can be processed at one time. However, a question remains about the nature of the stimulus properties that underlie face-specific capacity limits. Two experiments showed that speeded categorization of a famous face (such as a politician or pop star) is facilitated when it is congruent with a peripheral distractor face. This congruency effect is eliminated if the visual search is loaded with more than one face, unlike previous demonstrations of speeded classification using semantic information. Importantly, congruency effects are also eliminated when the search task is loaded with nontarget faces that are shown in an inverted orientation. These results indicate that face-specific capacity limits are not determined by the configural (“holistic”) properties of face recognition.     

To test or not to test: A clinical dilemma

This paper argues that clinicians are sometimes justified in not testing diagnoses or in not subjecting them to a full battery of tests. In deciding whether to conduct a test, a clinician may consider and weigh several different factors, including her confidence in her initial diagnosis, the specificity and sensitivity of the test, the consequences of making a false diagnosis, the pain, harm, and inconvenience caused by the test, and the costs of the test to the patient and society. This view suggests that diagnoses are fundamentally different from scientific hypotheses in that they are not always subjected to the same evidential standards.     

Executive working memory load does not compromise perceptual processing during visual search: Evidence from additive factors analysis

Executive working memory (WM) load reduces the efficiency of visual search, but the mechanisms by which this occurs are not fully known. In the present study, we assessed the effect of executive load on perceptual processing during search. Participants performed a serial oculomotor search task, looking for a circle target among gapped-circle distractors. The participants performed the task under high and low executive WM load, and the visual quality (Experiment 1) or discriminability of targets and distractors (Experiment 2) was manipulated across trials. By the logic of the additive factors method (Sternberg, 1969, 1998), if WM load compromises the quality of perceptual processing during visual search, manipulations of WM load and perceptual processing difficulty should produce nonadditive effects. Contrary to this prediction, the effects of WM load and perceptual difficulty were additive. The results imply that executive WM load does not degrade perceptual analysis during visual search.     

Cognitive load effects on early visual perceptual processing

Contrast-based early visual processing has largely been considered to involve autonomous processes that do not need the support of cognitive resources. However, as spatial attention is known to modulate early visual perceptual processing, we explored whether cognitive load could similarly impact contrast-based perception. We used a dual-task paradigm to assess the impact of a concurrent working memory task on the performance of three different early visual tasks. The results from Experiment 1 suggest that cognitive load can modulate early visual processing. No effects of cognitive load were seen in Experiments 2 or 3. Together, the findings provide evidence that under some circumstances cognitive load effects can penetrate the early stages of visual processing and that higher cognitive function and early perceptual processing may not be as independent as was once thought.     

To B- or not to B- a relation

Philosophical Studies - In his seminal work, McTaggart (Mind 17(68):457–484, 1908; The nature of existence, Cambridge University Press, Cambridge, 1927) dismissed the possibility of...     

Effects of increased processing load on parallel processing of visual displays

Display elements were sequentially painted upon a display scope in regular and irregular spatial-temporal orders. The primary result of Mayzner, Tresselt, and their associates is confirmed: within specified temporal-spatial limits, display elements may be perceptually blanked. Characteristics of perceptually blanked elements can, however, be revealed by forced-choice testing. The accuracy of tilt discrimination for perceptually blanked elements is equal to, or better than, that for nonblanked elements. Perceptually blanked elements can also be distinguished from absent and from partially absent elements, presumably on the basis of a crude brightness discrimination. Sequential blanking effects as revealed in the accuracy of slant detection, are not critically dependent upon the magnitude of uniform spacing between the display elements.     

To be or not to be: Buddhist selves in Toronto

Buddhist identity: a Buddhist by any other name?When we talk about a ‘Buddhist’ or ‘Buddhists’ in Canada and the United States, what exactly is our referent—a label or category, an identity, or perhaps something more? Is the term ‘Buddhist’ signifying a reified object (or subject?), one that subsumes all sorts of practices, beliefs, philosophies, and preconceptions under its umbrella? Or can the term be used to signify choice, personal commitment, motivation, partiality, and perhaps even struggle? We have a great many labels and categorizations of the differences among and between Buddhists, but can we really assume that the term ‘Buddhist’ itself is unproblematic? Calling someone a Buddhist in the West, or ‘naming’ them as such, appears initially and on the surface a fairly straightforward undertaking. And yet, the very act of naming itself is a composite of assumptions and expectations. In much of the anthropological literature on initiation rituals, the act of naming has been construed as more-or-less a societal quest for order and control of the individual. Naming marks who is ‘in’ and who is ‘out’. Being named is an important marker of social identity, socialness, and social belonging (inter alia, Jell-Bahlsen 1989; Jacquemet 1992; Cohen 1994).     

To be me or not to be me: About alienation

This article is about the experiential side of the concept of alienation and its relations to the stress process in the context of work and organization. We distinguish two kinds of alienation: primary alienation, the experience or feeling that something is different from normal, and secondary alienation, the absence of an experience of or feeling about something abnormal. After having gone into everyday reality and how it can be so disturbed that alienation ensues, we go further into the experiences involved in both kinds of alienation and their positive and negative consequences. Secondary alienation is described as a common final path in the second stage of a human stress process. In the discussion, we pay attention to the social scientific tradition of alienation as result of an evil societal influence, which has turned out to be an unfortunate approach. Instead, we advocate an approach that conceives alienation as the outcome of a personal choice. Lastly we indicate shortly what can be done about secondary alienation.     

To see or not to see: effects of visual feedback on performance and intuitions of quarterbacks in American football

We investigated the ability of quarterbacks in American football to intercept a moving receiver with a football in occluded and normal viewing conditions, and whether they can accurately predict their own success. Quarterbacks were successful in almost 80% of the trials in the occlusion condition, statistically as successful as in the normal viewing condition. Quarterbacks' predictions of their own success accounted for little variance in actual success. We propose that quarterbacks may attempt to generate a constant target-heading angle between where the football is thrown and the receiver, which may explain the high success rate in the occlusion condition.