Predicting whether multiculturalism positively or negatively influences White Americans' intergroup attitudes: the role of ethnic identification

Multiculturalism, or the belief that racial and ethnic differences should be acknowledged and appreciated, has been met with both positive reactions (e.g., decreased prejudice) and negative reactions (e.g., perceptions of threat) from dominant group members. The present research proposes that multiculturalism can either positively or negatively influence White Americans' intergroup attitudes depending on their degree of ethnic identification. In Studies 1 and 2, White Americans primed with multiculturalism exhibited higher social dominance orientation (Study 1) and greater prejudice (Study 2), especially when they identified strongly with their ethnicity. In Study 3, perceptions of threat to group values were found to mediate the relation between multiculturalism, ethnic identification, and prejudice among White Americans. The results are discussed in terms of their implications for threat perceptions, ethnic identification, and conceptions of diversity.     

系列再生法:实验模拟文化动态(英文)

系列再生法是一种用来探讨文化动态中的社会心理过程之实验方法。所谓文化动态是指文化如何形成、维持,以及如何随着时间而变化。此方法特别有利于以下研究:文化讯息是如何透过社会网络被传播、什么类型的文化讯息较可能透过社会网络被传播,以及文化讯息由一个人传到另一个人的过程中,是如何转化的。本文概述了系列再生实验方法的优点及缺点,讨论此方法的理论架构,并举例展诉如何有系统地应用此法,做有关文化刻板印象的研究。最后,本文讨论未来的研究方向,如文化动态的潜在文化差异,以及文化动态与社会网络之间的互动过程。     

A multilevel mediation model of stress and coping for women with HIV and their families

Families are influential systems and may be an important context in which to consider the stress and coping process. To date, many studies have focused on modeling the stress and coping process for the individual, isolated from the family. The purpose of this secondary analysis was to investigate a cross-sectional stress and coping model for HIV-positive African-American mothers recruited from HIV service facilities in South Florida (n=214) and their family members (n=294). Avoidance coping was hypothesized to mediate the relationship between stress and psychological distress. In addition, the family average of individual stress was hypothesized to moderate the relationship between avoidance coping and psychological distress. For all constructs, individuals reported on themselves and multilevel modeling techniques were used to account for similarities between members of the same family. The estimated mediation effect was significant. Aggregated family stress significantly moderated the relationship between avoidance coping and psychological distress. This study suggests that individuals exhibit different relationships between avoidance coping and psychological outcomes and that average stress reported by members of a family moderates the relationship between avoidance coping and psychological distress.     

Severe stuttering associated with right hemisphere lesion

Following a right hemisphere stroke, a right-handed, 50-year-old male experienced a permanent dysfluency characterized by phoneme and syllable reiterations and, to a lesser extent, word and phrase reiterations. The reiterations occurred in initial, medial, and final positions and for all sentence elements (e.g., subject nouns, object nouns, verbs, modifiers). There was a notable loss of verbal automatisms (poems, songs, etc.). The patient's symptoms conform to the acquired stuttering syndrome described by A. Helm, R. Butler, and D.F. Benson (1978, Neurology, 28, 1159-1165).     

Illness-Related Support and Negative Network Interactions: Effects on HIV-Infected Men's Depressive Symptomatology

Data collected as part of a psychosocial study of gay and bisexual men's experiences of living with HIV infection as a chronic illness were examined to investigate the psychological impact of the perceived availability of illness-related support and negative illness-related network interactions in a sample of men from this population. The sample was comprised of 144 HIV-infected non-Hispanic white, African American, and Puerto Rican men living in the New York City metropolitan area. Analyses found evidence of a conjoint (interactive) effect between perceived support and negative network interactions. There was no evidence of either perceived availability of illness-related network support buffering or negative illness-related network interactions amplifying the effect of HIV/AIDS-related physical symptomatology on depressive symptomatology.     

The over‐pruning hypothesis of autism

This article outlines the over‐pruning hypothesis of autism. The hypothesis originates in a neurocomputational model of the regressive sub‐type (Thomas, Knowland & Karmiloff‐Smith, 2011a, 2011b). Here we develop a more general version of the over‐pruning hypothesis to address heterogeneity in the timing of manifestation of ASD, including new computer simulations which reconcile the different observed developmental trajectories (early onset, late onset, regression) via a single underlying atypical mechanism; and which show how unaffected siblings of individuals with ASD may differ from controls either by inheriting a milder version of the pathological mechanism or by co‐inheriting the risk factors without the pathological mechanism. The proposed atypical mechanism involves overly aggressive synaptic pruning in infancy and early childhood, an exaggeration of a normal phase of brain development. We show how the hypothesis generates novel predictions that differ from existing theories of ASD including that (1) the first few months of development in ASD will be indistinguishable from typical, and (2) the earliest atypicalities in ASD will be sensory and motor rather than social. Both predictions gain cautious support from emerging longitudinal studies of infants at‐risk of ASD. We review evidence consistent with the over‐pruning hypothesis, its relation to other current theories (including C. Frith's under‐pruning proposal; C. Frith, 2003, 2004), as well as inconsistent data and current limitations. The hypothesis situates causal accounts of ASD within a framework of protective and risk factors (Newschaffer et al., 2012); clarifies different versions of the broader autism phenotype (i.e. the implication of observed similarities between individuals with autism and their family members); and integrates data from multiple disciplines, including behavioural studies, neuroscience studies, genetics, and intervention studies.     

Confirmatory Factor Analysis of the Structure of Adult ADHD Symptoms

Previous research has examined the factor structure of ADHD symptoms in adults using confirmatory factor analysis and there is mixed support for two-factor, three-factor, or more complex bifactor models. The current study re-examines these factor structures on the basis of not only overall model fit, but also criteria such as chi-square difference tests, invariance, reliability, and validity. Three datasets were pooled to form a total sample of 430 adults (50% female). Participants completed questionnaires assessing their ADHD symptoms, education, psychopathology, and parenting (the latter as validity variables). Although the bifactor models demonstrated the best fit, the reliability and construct replicability of specific factors in these models was poor. The three-factor model had good fit and demonstrated good reliability, validity, construct replicability, and some invariance across gender and dataset. Our results replicate previous studies that find superior fit for bifactor models. However, the superior statistical fit may reflect only the increased complexity of these models. The more parsimonious three-factor model may demonstrate stronger validity and clinical utility.