How little do we need for 3-D shape perception?

How little do we need to perceive 3-D shape in monocular natural images? The shape-from-texture and shape-from-shading perspectives would motivate that 3-D perception vanishes once low-level cues are disrupted. Is this the case in human vision? Or can top-down influences salvage the percept? In this study we probe this question by employing a gauge-figure paradigm similar to that used by Koenderink et al (1992, Perception & Psychophysics 52 487-496). Subjects were presented degraded natural images and instructed to make local assessments of slant and tilt at various locations thereby quantifying their internal 3-D percept. Analysis of subjects' responses reveals recognition to be a significant influence thereby allowing subjects to perceive 3-D shape at high levels of degradation. Specifically, we identify the 'medium-blur' condition, images approximately 32 pixels on a side, to be the limit for accurate 3-D shape perception. In addition, we find that degradation affects the perceived slant of point-estimates making images look flatter as degradation increases. A subsequent condition that eliminates texture and shading but preserves contour and recognition reveals how bottom-up and top-down cues can combine for accurate 3-D shape perception.     

Homograph norms: An alternative approach to determining meaning dominance

In the present study, we provide a new technique for the collection of homograph norms that reduces subjectivity in the determination of meaning dominance by allowing participants rather than experimenters to indicate to which meaning or meanings the associates were related. To evaluate the effectiveness of this new technique, a subset of homograph norms were used in three separate experiments, demonstrating that (1) when presented with additional meaning categories, participants classified the associates consistently into the primary and secondary meaning categories; (2) overall, the participants were most familiar with primary meanings, followed by secondary, tertiary, and quaternary meanings; and (3) the meaning categories provided to the participants during norms collection were appropriate, since the two meanings provided for each homograph by the participants were consistent with the original data. Finally, in a fourth experiment, we compared the results of this new technique with a parallel set collected in Australia. The high degree of similarity in the results provides validity for this procedure. The homograph norms discussed in this article may be downloaded from http://brm.psychonomic-journals.org/content/supplemental.     

OLD TEXTS,NEW MASKS: A CRITICAL REVIEW OF MISREADING EVOLUTION ONTO HISTORICAL ISLAMIC TEXTS

With the increasing interest in Islam and evolution, some Islamic thinkers have vehemently rejected evolution, while others have eagerly embraced it. However, those seeking to embrace evolution sometimes err in their interpretation of historical writings. Indeed, there are texts written by famous historical scholars of Islam who seem to suggest that humans have evolved from lower forms of species. These include Ibn Khaldūn, Jalāl ad‐Dīn Rūmī, al‐Jāhiz, and The Brethren of Purity (Ikhwān al Safā). Although this may be true, such readings are a mistaken interpretation of the aforementioned authors who are actually referring to some form of the scalae naturae (the Great Chain of Being). This reference to the Great Chain of Being is unknown to some contemporary readers who mistakenly believe these writers to be discussing an evolutionary or a proto‐evolutionary theory. This article demonstrates how and why these historical records do not actually represent any notion of evolution as it is currently understood, in the hope of avoiding any further erroneous claims that seem to be proliferating among modern thinkers.     

Beyond reciprocity: gratitude and relationships in everyday life

The emotion of gratitude is thought to have social effects, but empirical studies of such effects have focused largely on the repaying of kind gestures. The current research focused on the relational antecedents of gratitude and its implications for relationship formation. The authors examined the role of naturally occurring gratitude in college sororities during a week of gift-giving from older members to new members. New members recorded reactions to benefits received during the week. At the end of the week and 1 month later, the new and old members rated their interactions and their relationships. Perceptions of benefactor responsiveness predicted gratitude for benefits, and gratitude during the week predicted future relationship outcomes. Gratitude may function to promote relationship formation and maintenance.     

Subliminal exposure to faces and racial attitudes: Exposure to Whites makes Whites like Blacks less

Despite recent social and political advances, most interracial contact is still superficial in nature, and White individuals interact mainly with other Whites. Based on recent mere exposure research, we propose that repeated exposure to Whites may actually increase prejudice. In a series of experiments, White participants were subliminally exposed to White faces or nothing (control) and then completed various explicit and implicit measures of racial attitudes. Exposure to White faces consistently led to more prejudice by making attitudes toward Blacks more negative, rather than by making attitudes toward Whites more positive. A final experiment demonstrated that the pattern of increased prejudice following exposure to Whites was moderated by the strength of participants’ attitudes toward Whites. Only when White attitudes were strong did Black attitudes became more negative after exposure to White faces.     

The role of the media in body image concerns among women: a meta-analysis of experimental and correlational studies

Research suggests that exposure to mass media depicting the thin-ideal body may be linked to body image disturbance in women. This meta-analysis examined experimental and correlational studies testing the links between media exposure to women's body dissatisfaction, internalization of the thin ideal, and eating behaviors and beliefs with a sample of 77 studies that yielded 141 effect sizes. The mean effect sizes were small to moderate (ds = -.28, -.39, and -.30, respectively). Effects for some outcome variables were moderated by publication year and study design. The findings support the notion that exposure to media images depicting the thin-ideal body is related to body image concerns for women.     

Body Objectification,MTV, and Psychological Outcomes Among Female Adolescents1

In response to the American Psychological Association's Task Force on the Sexualization of Girls, the present study explored the role of sexually objectifying media—in this case, music television—in a host of psychological consequences among a community sample of adolescents girls (M age = 13 years). Objectification theory posits that the consequences of sexual objectification involve the process of self‐objectification. As such, we hypothesized that music television consumption would first and foremost be associated with self‐objectification, which would, in turn, predict a number of body‐related consequences. The findings support a model in which self‐objectification mediates a direct relation between music television viewing and body esteem, dieting, depressive symptoms, anxiety, and confidence in math ability.     

Focus of attention and causal attributions of actors and observers

An experiment was conducted to test the hypothesis that actors' and observers' causal attributions are a function of their focus of attention. In the presence of observer-subjects, actor-subjects made a choice among several art works in a supposed decision-making study. The experiment was a 2 × 2 × 2 factorial design with the factors (1) source of attribution (actors, observers); (2) camera (actor videotaped, actor not videotaped); and (3) situational stability (stable, dynamic environment). As predicted by the focus of attention-causal attribution notion, it was found that actors attributed more causality to the situation than observers under normal circumstances, when the camera was not operative, but that videotaping the actor reversed the usual actor-observer pattern such that actors attributed less causality to the situation than did observers. Further, when the environment was stable, actors attributed more causality to the situation in the no camera condition than in the camera condition, while observers attributed less to the situation in the no camera conditions than in the camera conditions. Additionally, both actors and observers attributed more causality to the situation when the environment was dynamic than when the environment was stable.