Can intergroup contact improve humanity attributions?

In this paper, intergroup contact was evaluated as a strategy to favor outgroup humanization. We tested a double‐mediation model, in which contact is associated with both decreased salience of intergroup boundaries and the adoption of a common identity. These recategorizations, in turn, are related to lower levels of anxiety and higher levels of empathy, both emotions being proximal predictors of outgroup humanization. The model was tested using structural equation modeling in the context of different intergroup relations: Italians versus immigrants (Study 1); Northern Italians versus Southern Italians (Study 2). Supporting the hypotheses, group representations and emotions mediated the relationship between contact and humanity attributions. The practical implications of results are discussed.     

Americans are Barbarians or Allies? Images of Americans in the Italian Social Context

Image theory was tested in the context of Italian/American relationships. Participants were Italian students. In addition to the images of ally, barbarian, imperialist, enemy, a new image was suggested: that of father. We predicted that political orientation would affect the structural perceptions (goal compatibility, relative power, relative status), and, as a consequence, the image of Americans: right-wing participants should prefer the images of father and ally, while left-wing participants should associate Americans with barbarian. Findings generally supported our predictions; also the figure of father obtained some support. The theoretical and practical implications of results are discussed.     

Faster forgetting contributes to impaired spatial memory in the PDAPP mouse: Deficit in memory retrieval associated with increased sensitivity to interference?

Two experiments were conducted to investigate the possibility of faster forgetting by PDAPP mice (a well-established model of Alzheimer's disease as reported by Games and colleagues in an earlier paper). Experiment 1, using mice aged 13-16 mo, confirmed the presence of a deficit in a spatial reference memory task in the water maze by hemizygous PDAPP mice relative to littermate controls. However, after overtraining to a criterion of equivalent navigational performance, a series of memory retention tests revealed faster forgetting in the PDAPP group. Very limited retraining was sufficient to reinstate good memory in both groups, indicating that their faster forgetting may be due to retrieval failure rather than trace decay. In Experiment 2, 6-mo-old PDAPP and controls were required to learn each of a series of spatial locations to criterion with their memory assessed 10 min after learning each location. No memory deficit was apparent in the PDAPP mice initially, but a deficit built up through the series of locations suggestive of increased sensitivity to interference. Faster forgetting and increased interference may each reflect a difficulty in accessing memory traces. This interpretation of one aspect of the cognitive deficit in human mutant APP mice has parallels to deficits observed in patients with Alzheimer's disease, further supporting the validity of transgenic models of the disease.     

Reactions to gay men: Contact and overcorrection in an employee selection simulation

The current study examines the role of contact on reactions to gay and heterosexual targets by U.S. heterosexual college students. Aversive bias research finds that minority group members receive unfavorable evaluations only when non-category-based information justifies bias. We argue that under other conditions, namely absence of conditions justifying bias, minority group members receive more favorable evaluations than non-minorities, an effect we term overcorrection. We apply this research to the study of attitudes toward gay men. The current study examines this effect on evaluations of a highly qualified male job candidate who is either gay or heterosexual and flawed or not flawed. We predicted and found, among 180 college students, that the overcorrection effect was present only for those individuals who have experienced no friendships with gay men. Those individuals who do have gay male friends did not exhibit overcorrection. We interpret this result as an indication that individuals who have gay friends (contact) ignore category information such as gay/ heterosexual and are more likely to exhibit truly egalitarian ratings. Implications for aversive bias and outgroup covariation perspectives are discussed. We presented portions of this paper at the 2000 Western Psychological Association conference, Maui, HI.     

Scientific Communication and Stereotype Change1

The aim of this experiment is to examine whether communicating the results of social psychological research improves out‐group stereotypes and diminishes in‐group bias. The experimental material consisted of 2 communications: one described Hamilton and Gifford's (1976) experiment on illusory correlation (Experiment 1); the other described Sherif's (1966) studies on summer camps. The results of the present experiment show that knowledge of Sherif's findings had no effect on evaluations, whereas an awareness of the experiment on illusory correlation produced a boomerang effect, accentuating, rather than diminishing, in‐group bias. A second experiment revealed that the persuasive power of a scientific message on stereotypes depends on whether in‐groups and out‐groups are cogni‐tively present in the message acquisition phase.     

A Simple Method for Comparing Complex Models: Bayesian Model Comparison for Hierarchical Multinomial Processing Tree Models Using Warp-III Bridge Sampling

Psychometrika - Multinomial processing trees (MPTs) are a popular class of cognitive models for categorical data. Typically, researchers compare several MPTs, each equipped with many parameters,...     

Ethnic differences in clinical presentation of depression in adult women

This study examined ethnic differences in self-report and interviewer-rated depressive symptoms and estimated the contributions of sociodemographic and psychosocial factors in predicting severity of depression. One hundred twenty-five clinically depressed African American (n = 46), Caucasian (n = 36), and Latina (n = 43) women were recruited. After controlling for differences in socioeconomic status, African American women reported more symptoms of distress and Latinas were rated as significantly more depressed than the other groups. However, these ethnic differences were not moderated by either education or employment. Finally, hierarchical regression analysis indicated that severity of depression was predicted by low education, being single, being Latina, high perceived stress, and feelings of hopelessness. Additional research is needed to validate these results and to investigate their clinical significance.     

Cultural innovation and transmission of tool use in wild chimpanzees: evidence from field experiments

Chimpanzees (Pan troglodytes) are the most proficient and versatile users of tools in the wild. How such skills become integrated into the behavioural repertoire of wild chimpanzee communities is investigated here by drawing together evidence from three complementary approaches in a group of oil-palm nut- (Elaeis guineensis) cracking chimpanzees at Bossou, Guinea. First, extensive surveys of communities adjacent to Bossou have shown that population-specific details of tool use, such as the selection of species of nuts as targets for cracking, cannot be explained purely on the basis of ecological differences. Second, a 16-year longitudinal record tracing the development of nut-cracking in individual chimpanzees has highlighted the importance of a critical period for learning (3–5 years of age), while the similar learning contexts experienced by siblings have been found to result in near-perfect (13 out of 14 dyads) inter-sibling correspondence in laterality. Third, novel data from field experiments involving the introduction of unfamiliar species of nuts to the Bossou group illuminates key aspects of both cultural innovation and transmission. We show that responses of individuals toward the novel items differ markedly with age, with juveniles being the most likely to explore. Furthermore, subjects are highly specific in their selection of conspecifics as models for observation, attending to the nut-cracking activities of individuals in the same age group or older, but not younger than themselves. Together with the phenomenon of inter-community migration, these results demonstrate a mechanism for the emergence of culture in wild chimpanzees.     

Does intergroup contact affect personality? A longitudinal study on the bidirectional relationship between intergroup contact and personality traits

We conducted a longitudinal study to test whether, in addition to being predicted by personality, intergroup contact is longitudinally associated with personality traits. Participants were 388 majority (Italian) and 109 minority (immigrant) first‐year high school students. Results revealed a bidirectional relationship between contact and personality: Quality of contact was longitudinally associated with greater agreeableness and openness to experience, whereas agreeableness and openness to experience were longitudinal predictors of contact quality. An unexpected negative longitudinal association also emerged between quantity of contact and agreeableness. These effects were not moderated by group of belonging (majority vs. minority). Our findings highlight the importance of integrating research on intergroup contact with research on personality.