Orientation tuning of shape from shading

Four experiments were performed to assess the effect of different orientations and direction of lighting on the visual processing of shaded or bipartite disks. In the first two experiments, observers were presented with nine different shading orientations from 0 degree to 180 degrees. Targets were detected in a rapid and parallel fashion for shaded disks when the orientation of the shading gradient was not horizontal (90 degrees) or oriented at 67.5 degrees. Search asymmetries favoring the detection of "pock" targets over "ball" targets were found for all orientations. The search rates for bipartite disks were similar to the shaded disks at 0 degree, 22.5 degrees, and 90 degrees but not for intermediate orientations, and no search asymmetries were found. These differences suggest that shaded displays and bipartite displays are processed by different underlying mechanisms. The third experiment showed that the direction of the light source (left or right) had no influence on search asymmetries around the 90 degrees point. Shading gradient orientation affected magnitude estimates of depth in the fourth experiment. These experiments show that the visual system's "assumption" of overhead lighting is broadly tuned.     

The effects of aggressive pornography on beliefs in rape myths: Individual differences

This experiment assessed the effects of media depictions that portray rape myths on men's beliefs in such myths. The study was conducted in two separate sessions. At the orientation session, measures of personality, motivation, experience, and aggressive tendencies were administered to 307 males. In the experimental session, 145 of these men were first exposed to one of eight audiotaped versions of a passage. One of these portrayed the myth that rape results in the victim's sexual arousal. Later, subjects listened to a second passage depicting either nonconsenting or consenting sex. Their perceptions of the second portrayal and their beliefs in rape myths were then measured. The findings provided support for the hypothesis that media depictions suggesting that rape results in the victim's arousal can contribute to men's beliefs in a similar rape myth. Moreover, analysis of the mediating role of individual differences indicated that men with relatively higher inclinations to aggress against women are particularly likely to be affected by media depictions of rape myths. It is suggested that these data may be explained best on the basis of information retrieval processes. In addition, it was found that power motives were consistently related to greater beliefs in rape myths.     

Speech rate and the development of short-term memory span

Two experiments are reported which examine the effects of word duration on memory span in subjects of different ages. The same linear function relating recall to speech rate (assessed by the speed of repeating words) fits the results of subjects ranging in age from 4 years old to adulthood. It is concluded that developmental increases in short-term memory span can be explained in terms of increases in speech rate and that there is no evidence for an increase in short-term memory capacity. Analyses of the children's speech suggests that increases in speech rate with age reflect increases in the speed of articulation of individual words, rather than any change in the duration of pauses between successive words or changes in coarticulation between words.     

Perceptual interference at encoding enhances recall for high- but not low-imageability words

Interfering with stimulus perception during encoding can improve later explicit memory (the perceptual-interference effect). The compensatory-processing hypothesis attributes the perceptualinterference effect to enhanced processing of higher level (nonvisual) information during perception. Recent research indicates that the semantic dimension of imageability is one type of higher level information that plays a role in word perception. To the extent that semantic representations play a more important role in the perception of high- than for low-imageability words, the compensatoryprocessing hypothesis predicts a larger perceptual-interference effect for high- than for lowimageability words. Two experiments confirm this prediction. A robust effect of perceptual interference was found for high- but not for low-imageability words.     

Aging and Ethnicity: Issues for Clinical Practice

Due to dramatic improvements in life expectancy among Americans from diverse ethnic groups, the graying of America is resulting in a particularly marked increase in ethnic diversity in late life. Clinicians must be prepared to address the problems of older ethnic minority patients, who present with distinct problems during late life and may present these problems in culturally prescribed ways. Cultural variations in views about the nature of mental disorders, issues in assessing and treating depression and dementia, and attention to issues of family caregivers are deserving of special attention.     

Self-criticism, dependency and the five factor model of personality in depression: assessing construct overlap

The construct overlap between the lower-ordered personality constructs linked to depression, dependency and self-criticism, and higher-ordered personality constructs of the Five Factor Model (FFM) were assessed by exploratory factor analysis in a depressed sample. Three robust factors were extracted: negative affectivity (Neuroticism, Self-Criticism), positive affectivity (Extraversion, Openness), and interpersonal sensitivity (Dependency, Agreeableness). These findings suggest that there is significant construct redundancy between self-criticism and Neuroticism, while dependency appears to represent a more unique dimension associated with, but relatively distinct from Neuroticism and the other dimensions of the FFM.     

Triangles in ROC space: History and theory of “nonparametric” measures of sensitivity and response bias

Can accuracy and response bias in two-stimulus, two-response recognition or detection experiments be measured nonparametrically? Pollack and Norman (1964) answered this question affirmatively for sensitivity, Hodos (1970) for bias: Both proposed measures based on triangular areas in receiver-operating characteristic space. Their papers, and especially a paper by Grier (1971) that provided computing formulas for the measures, continue to be heavily cited in a wide range of content areas. In our sample of articles, most authors described triangle-based measures as making fewer assumptions than measures associated with detection theory. However, we show that statistics based on products or ratios of right triangle areas, including a recently proposed bias index and a not-yetproposed but apparently plausible sensitivity index, are consistent with a decision process based on logistic distributions. Even the Pollack and Norman measure, which is based on non-right triangles, is approximately logistic for low values of sensitivity. Simple geometric models for sensitivity and bias are not nonparametric, even if their implications are not acknowledged in the defining publications.     

Divided attention and indirect memory tests

Attentional state during acquisition is an important determinant of performance on direct memory tests. In two experiments we investigated the effects of dividing attention during acquisition on conceptually driven and data-driven indirect memory tests. Subjects read a list of words with or without distraction. Memory for the words was later tested with an indirect memory test or a direct memory test that differed only in task instructions. In Experiment 1, the indirect test was categoryexemplar production (a conceptually driven task) and the direct test was category-cued recall. In Experiment 2, the indirect test was word-fragment completion (a data-driven task) and the direct test was word-fragment cued recall. Dividing attention at encoding decreased performance on both direct memory tests. Of the indirect tests, category-exemplar production but not word-fragment completion was affected. The results indicate that conceptually driven indirect memory tests, like direct memory tests, are affected by divided attention, whereas data-driven indirect tests are not. These results are interpreted within the transfer-appropriate processing framework.     

Gender Differences in Supervisors’ Use of Performance Feedback1

This study examined whether male and female supervisors differed in their delivery of performance feedback to subordinates. Male and female subjects supervised 2 confederate subordinates whose performance was stable and either above or below average. Supervisors regularly checked each subordinate's performance and could deliver one of several feedback messages. A MANOVA was performed on frequency of specific negative, general negative, specific positive, general positive, and neutral feedback messages, followed by step down analyses to isolate which dependent variables contributed uniquely. Male and female supervisors were distinguished by their use of specific negative feedback. Males were more likely to provide such messages to poorly performing subordinates, a result consistent with suggestions that males are characterized by a more directive leadership style.     

PARTICIPATION RATES AND MAXIMAL PERFORMANCE:

Abstract— Can the superiority of some countries and groups at certain activities be explained solely by the relative sizes of the participating populations? We focus on the expected highest achievement, max, as a function of the participating group's size For several relevant statistical distributions, max can be shown to be approximately log-linear in sample size, with a slope of about 0 7 SD units We use this relation (max is log-linear ∼0 7 MILL7) to examine differences in performance in chess by men and women and by different countries The expected differences under MILL7 are very close to the observed differences We also examine the implications of MILL7 for the interpretation of other group differences and discuss its limitations