The generic-viewpoint assumption and illusory contours

Visual images are ambiguous. Any image, or collection of images, is consistent with an infinite number of possible scenes in the world. Yet we are generally unaware of this ambiguity. During ordinary perception we are generally aware of only one, or perhaps a few of these possibilities. Human vision evidently exploits certain constraints--assumptions about the world and images formed of it--in order to generate its perceptions. One constraint that has been widely studied by researchers in human and machine vision is the generic-viewpoint assumption. We show that this assumption can help to explain the widely discussed fact that outlines of blobs are ineffective inducers of illusory contours. We also present a number of novel effects and report an experiment suggesting that the generic-viewpoint assumption strongly influences illusory-contour perception.     

Structural differences in parent and child reports of children's symptoms of depression and anxiety

Two cohorts of public elementary school children and their parents (assessed 3 years apart) completed child and parent forms of the Children's Depression Inventory (CDI) and the Revised Children's Manifest Anxiety Scale (RCMAS). Assessments were conducted twice, once during the fall (N = 562) and again during the spring (N = 630) of the 6th grade. Factor analyses revealed 3 factors for each measure. Two of the 3 parent CDI factors manifested some degree of congruence with their counterparts from the child CDI. Similarly, 2 of the 3 RCMAS factors were somewhat congruent across informant types. Differences between parent and child factor structures suggest that parents' and children's reports focus on somewhat different aspects of child psychopathology, and they can make qualitatively different contributions to the multiaxial assessment of children.     

Got Pain? Racial Bias in Perceptions of Pain

In the days of slavery, White people assumed that Black people felt less pain than did White people. This belief was used to justify slavery; it was also used to justify the inhumane treatment of Black men and women in medical research. Today, White Americans continue to believe that Black people feel less pain than do White people although this belief has changed from its historical, explicitly racist form. Racial attitudes do not moderate the bias, suggesting that racial bias in perceptions of others' pain is not rooted (solely) in racial prejudice. Moreover, Black Americans too believe that Black people feel less pain than do White people, suggesting that the bias is no longer grounded in intergroup dynamics. Rather, contemporary forms of this bias stem from assumptions that Black people face more hardship and “thus” can withstand more pain and assumptions that Black people's bodies are not only different but also superhuman. Although this new instantiation of the pain perception bias is decidedly more “benevolent”, it can nonetheless lead to negative outcomes. Here, we consider how racial bias in perceptions of others' pain may affect racial disparities in health care and intergroup relations more generally. We also discuss potential avenues for interventions aimed at preventing this bias among children and reducing this bias among adults.     

Selective scanpath repetition during memory-guided visual search

Visual search efficiency improves with repetition of a search display, yet the mechanisms behind these processing gains remain unclear. According to Scanpath Theory, memory retrieval is mediated by repetition of the pattern of eye movements or “scanpath” elicited during stimulus encoding. Using this framework, we tested the prediction that scanpath recapitulation reflects relational memory guidance during repeated search events. Younger and older subjects were instructed to find changing targets within flickering naturalistic scenes. Search efficiency (search time, number of fixations, fixation duration) and scanpath similarity (repetition) were compared across age groups for novel (V1) and repeated (V2) search events. Younger adults outperformed older adults on all efficiency measures at both V1 and V2, while the search time benefit for repeated viewing (V1–V2) did not differ by age. Fixation-binned scanpath similarity analyses revealed repetition of initial and final (but not middle) V1 fixations at V2, with older adults repeating more initial V1 fixations than young adults. In young adults only, early scanpath similarity correlated negatively with search time at test, indicating increased efficiency, whereas the similarity of V2 fixations to middle V1 fixations predicted poor search performance. We conclude that scanpath compression mediates increased search efficiency by selectively recapitulating encoding fixations that provide goal-relevant input. Extending Scanpath Theory, results suggest that scanpath repetition varies as a function of time and memory integrity.     

Generating Trust in Congregations: Engagement,Exchange, and Social Networks

The relationship between religion and trust is complex and there is little consensus on why, in general, religious people appear to be more trusting than their unaffiliated peers. Most research on religion and trust focuses on differences between traditions and denominations, which offers rather limited insight into the genesis of trust for religious persons. In this study, we draw on recent theoretical developments in social psychology to explore how specific patterns of social interactions within congregations enhance within‐congregation trust among members to the benefit of both churches and individuals. Using survey data from the Portraits of American Life Study, we find that the positive relationship between religiosity and trust is driven less by religious beliefs or practices and more by particular characteristics of micro‐level processes that occur in churches (e.g., closeness of relationships to religious leaders, density of congregational ties, and both giving and receiving aid from other congregation members). In light of research on social learning and trust, we also discuss the potential benefits of this particularized trust for individuals’ levels of generalized trust.     

The Impact of Religiosity on Suicidal Ideation Among Youth in Central Mexico

Although over 100 years of research has been dedicated to understanding the connection between religiosity and suicide, many questions still remain. This is especially true among adolescent populations in countries outside the US. In 2008, over 700 students attending eight alternative high school centers in central Mexico completed a health survey designed to provide a comprehensive overview of their physical, mental, spiritual, and emotional health. This article reports on the findings of a secondary analysis study of those data and focuses on the protective influence of religiosity on suicidal ideation. The findings of this study are discussed in light of the network theory’s assertion that there is a belonging aspect to religion, and also to the idea that in religiously homogeneous communities of Mexico, religion can have a protective effect on the suicidal ideation of its members.