群体交叉分类效应的代数模型及其潜在加工过程

交叉分类被认为是一种能够有效减少群际偏见的方法。交叉分类效应的代数模型主要包括平均模型、相加模型和等价模型,各个模型都有自己成立的证据,其中支持相加模型的研究证据最多。尽管如此,交叉分类效应的代数模型有很明显的局限,即要求所有进行交叉的类别维度权重相等,这与真实社会情境是相矛盾的。交叉分类的潜在加工过程主要有基于认知角度的类别差异模型和基于动机角度的社会认同两种比较成熟的理论,前者又分为类别差异消除模型和类别差异减少模型。     

Asymmetrical responding to male versus female other-race categories in 9- to 12-month-old infants

Faces can be categorized along various dimensions including gender or race, an ability developing in infancy. Infant categorization studies have focused on facial attributes in isolation, but the interaction between these attributes remains poorly understood. Experiment 1 examined gender categorization of other-race faces in 9- and 12-month-old White infants. Nine- and 12-month-olds were familiarized with Asian male or female faces, and tested with a novel exemplar from the familiarized category paired with a novel exemplar from a novel category. Both age groups showed novel category preferences for novel Asian female faces after familiarization with Asian male faces, but showed no novel category preference for novel Asian male faces after familiarization with Asian female faces. This categorization asymmetry was not due to a spontaneous preference hindering novel category reaction (Experiment 2), and both age groups displayed difficulty discriminating among male, but not female, other-race faces (Experiment 3). These results indicate that category formation for male other-race faces is mediated by categorical perception. Overall, the findings suggest that even by 12 months of age, infants are not fully able to form gender category representations of other-race faces, responding categorically to male, but not female, other-race faces.     

Crossed categorization in common ingroup contexts

In three experiments, the authors tested the hypothesis that a common ingroup context would moderate evaluations of crossed category targets. In Experiment 1, the typical additive pattern of evaluation across artificial crossed category groups became a social inclusion pattern in a common ingroup context. In Experiment 2, the authors manipulated the importance of real crossed category targets. When the crossed groups were of low importance, the effects of imposing a common ingroup replicated those observed in Experiment 1. For important crossed groups, however, the additive pattern remained. In Experiment 3, the authors measured perceived importance of the crossed groups to social identity prior to introducing a common ingroup context. The effects of a common categorization on evaluations were again moderated by perceived importance. These findings are discussed in the context of integrating crossed categorization and common ingroup identity models of multiple categorization.     

Contextual changes in the prototypicality of extreme and moderate outgroup members

Previous social categorization research has tended to treat prototypicality (the degree to which a stimulus is representative of a category) as a fixed stimulus property. In contrast, self-categorization theory sees prototypicality as an aspect of the categorization process that is dependent on features of the social context within which categorization takes place. To test this view two experiments (Ns = 256, 73) examined the perceived representativeness of extreme and moderate members of the same target outgroup in conditions which manipulated the salience of intergroup division. As predicted, the extremist was seen to be relatively more representative of the outgroup than the moderate to the extent that intergroup differences were salient. In Experiment 1 the extremist's message was also seen to be less important in low salience conditions and in Experiment 2 shifts in prototypicality were associated with changes in the evaluation of individual targets. Implications for the analysis of social categorization and stereotyping are discussed.     

Crossed categorization and stereotyping: Structural analyses, effect patterns, and dissociative effects of context relevance

Based on the “Who said what?” paradigm, a new method is proposed for investigating social categorization and non-evaluative stereotype application in crossed categorization. The method is applied in 5 studies that manipulated relative context relevance of crossed age and gender categories. Social categorization is characterized by 2 indices: Relative subgroup memory assesses the amount of subgroup formation represented in memory, and relative category dominance the relative weight of each dimension of categorization. Both indices were affected by context relevance. There was strong evidence for social categorization at the subgroup level, whereas stereotype application followed a simple pattern of category dominance, in which only the context-relevant dimension exerted an effect. The results bear on current models of category-based impression formation and intergroup perception, and on category-activation cum stereotype-inhibition models.     

Reduced intergroup differentiation as a result of self-categorization in overlapping categories. A quasi-experiment

A quasi-experiment was conducted to examine the effects of self-categorization in overlapping categories on intergroup differentiation. ‘Old aged women’ was used as the first, ‘sports’ as the additional category. It could be shown that intergroup differentiation was significantly reduced under crossed categorization conditions. Implications for social compensation strategies are discussed.     

Crossed categorization versus simple categorization and intergroup evaluations: a meta‐analysis

Crossed categorization typically refers to the crossing of two dichotomous social dimensions, resulting in four groups (double‐ingroup, two mixed groups, and double‐outgroup). This paper reports the results of a meta‐analysis comparing the effects of crossed categorization on intergroup evaluations with the effects of simple categorization on intergroup evaluations. The crossed categorization paradigm is shown to increase or decrease ingroup bias, depending on how ingroup bias is defined in the crossed categorization paradigm. Moreover, just as in simple categorization, ingroup bias in crossed categorization is shown to be greater when the proportionate size of the ingroup is smaller. However, contrary to the patterns established in simple categorization, the reality of the group categorizations does not increase ingroup bias in crossed categorization. We discuss the implications of these results for future research on intergroup evaluations. Copyright © 2001 John Wiley & Sons, Ltd.     

Bias at the intersection of race and gender: Evidence from preschool‐aged children

There is ample evidence of racial and gender bias in young children, but thus far this evidence comes almost exclusively from children's responses to a single social category (either race or gender). Yet we are each simultaneously members of many social categories (including our race and gender). Among adults, racial and gender biases intersect: negative racial biases are expressed more strongly against males than females. Here, we consider the developmental origin of bias at the intersection of race and gender. Relying on both implicit and explicit measures, we assessed 4‐year‐old children's responses to target images of children who varied systematically in both race (Black and White) and gender (male and female). Children revealed a strong and consistent pro‐White bias. This racial bias was expressed more strongly for males than females: children's responses to Black boys were less positive than to Black girls, White boys or White girls. This outcome, which constitutes the earliest evidence of bias at the intersection of race and gender, underscores the importance of addressing bias in the first years of life.     

Forgiveness and collective guilt assignment to historical perpetrator groups depend on level of social category inclusiveness

The authors examined how categorization influences victimized group members' responses to contemporary members of a historical perpetrator group. Specifically, the authors tested whether increasing category inclusiveness--from the intergroup level to the maximally inclusive human level--leads to greater forgiveness of a historical perpetrator group and decreased collective guilt assignment for its harmdoing. Among Jewish North Americans (Experiments 1, 2, and 4) and Native Canadians (Experiment 3) human-level categorization resulted in more positive responses toward Germans and White Canadians, respectively, by decreasing the uniqueness of their past harmful actions toward the in-group. Increasing the inclusiveness of categorization led to greater forgiveness and lessened expectations that former out-group members should experience collective guilt compared with when categorization was at the intergroup level. Discussion focuses on obstacles that are likely to be encountered on the road to reconciliation between groups that have a history of conflictual relations.     

Generalization of positive attitude as a function of subgroup and superordinate group identifications in intergroup contact

The role of category salience in mediating the effects of intergroup contact was examined. One theoretical model proposes that some psychological salience of subgroup categories is necessary to facilitate the generalization of attitude change beyond the immediate contact situation. Another argues that a re‐categorization of the subgroups into a new superordinate category is more beneficial, whilst a third suggests that de‐categorizing the situation entirely is optimal. An alternative view, which combines the first two models, proposes a Dual Identity strategy (simultaneous high superordinate and high subgroup categorization) as an important mediator of the relationship between contact variables and intergroup attitudes. In the study, participants (N = 114) undertook a cooperative intergroup task under four conditions of category salience: ‘subgroup’, ‘superordinate’, ‘superordinate and subgroup’, and ‘no group salience’. Evaluative ratings and symbolic reward allocations both for the groups encountered (contact) and those outside the situation (generalization) provided measures of intergroup bias. Bias within the contact situation was mainly eliminated in all conditions. However, on the more generalized bias measures, only the ‘superordinate’ and ‘superordinate and subgroup’ (Dual Identity strategy) conditions maintained this low level; in the other two conditions intergroup bias resurfaced. A combination of the first two models is proposed. Copyright © 2002 John Wiley & Sons, Ltd.     

The treatment of relevant and irrelevant outgroups in minimal group situations with crossed categorizations

Among a sample of Belgian high school boys, the author attempted to determine on the basis of social identity theory (H. Tajfel & J. C. Turner, 1979) whether an outgroup's relevancy in intergroup comparisons influences the amount of intergroup discrimination. Relevancy was manipulated by the use of 2 trivial categorization dimensions that were orthogonally crossed. In 1 of the crossed categorization conditions, this procedure resulted in the formation of 4 groups, whereas in the 2nd condition, only 2 of these groups were effectively formed. Nevertheless, the participants in both conditions were instructed to evaluate 4 groups--either 4 actual groups (1st condition) or 2 actual and 2 hypothetical groups (2nd condition). In both conditions, the intergroup evaluations exhibited the same pattern--that is, they did not differentiate their ingroups from the partly overlapping groups but were clearly biased against the double outgroup.     

Dual identities in intergroup contact: Group status and size moderate the generalization of positive attitude change

To explore the effects of various categorization strategies on intergroup bias within and beyond a contact situation, two experiments were conducted involving groups of different size and/or status that worked together on a cooperative task. Three categorization strategies (decategorization, recategorization, and dual identity) were compared, and bias was measured through symbolic reward allocations to people who were and were not actually encountered. In Experiment 1 (N = 129), we varied group size (minority or majority) and found that it affected bias within the contact situation—minority groups were more biased than majority groups. All of the categorization strategies limited bias and they did so equally well. Outside the contact situation, however, only the recategorization and dual identity strategies limited bias. In Experiment 2 (N = 156), we varied both group status (low or high) and group size. Both of these variables affected bias within the contact situation—high status groups were more biased than low status groups, and minority groups were again more biased than majority groups. Once again, all three categorization strategies limited bias and they did so equally well. Outside the contact situation, however, an interaction among the independent variables was observed. For minority groups, only the dual identity strategy limited bias, but none of the categorization strategies limited bias for majority groups.     

Decategorization and the reduction of bias in the crossed categorization paradigm

Within the crossed categorization paradigm we examined the consequences of cooperative and personalized contact under conditions that promoted attention to unique attributes of team members (decategorization) versus conditions that emphasized their category memberships. As predicted, when the rule for composing teams emphasized one or both of the experimentally induced dimensions of category distinction, ethnocentric bias generalized to members of another team as a function of category similarity. When, instead, the rule emphasized team members' unique attributes, shared in‐group memberships no longer moderated bias towards members of another team. Instead, there was an equivalence pattern in the evaluative ratings of the four targets (in‐group/in‐group; in‐group/out‐group; out‐group/in‐group; out‐group/out‐group) of the crossed categorization paradigm. Copyright © 2001 John Wiley & Sons, Ltd.     

The Treatment of Relevant and Irrelevant Outgroups in Minimal Group Situations With Crossed Categorizations

Abstract

Among a sample of Belgian high school boys, the author attempted to determine on the basis of social identity theory (H. Tajfel & J. C. Turner, 1979) whether an outgroup's relevancy in intergroup comparisons influences the amount of intergroup discrimination. Relevancy was manipulated by the use of 2 trivial categorization dimensions that were orthogonally crossed. In 1 of the crossed categorization conditions, this procedure resulted in the formation of 4 groups, whereas in the 2nd condition, only 2 of these groups were effectively formed. Nevertheless, the participants in both conditions were instructed to evaluate 4 groups–either 4 actual groups (1st condition) or 2 actual and 2 hypothetical groups (2nd condition). In both conditions, the intergroup evaluations exhibited the same pattern–that is, they did not differentiate their ingroups from the partly overlapping groups but were clearly biased against the double outgroup.     

Change in school ethnic diversity and intergroup relations: The transition from segregated elementary to mixed secondary school for majority and minority students

This research examined the impact of a change in school diversity on school children's intergroup relations. A longitudinal survey tracked 551 White British and Asian British students (M_age = 11.32) transitioning from elementary (time 1) to secondary (time 2) school in an ethnically segregated town in the United Kingdom. We estimated a multivariate, multilevel model. A cross-sectional comparison of segregated schools and a mixed elementary school at time 1 revealed that both Asian and White British in the mixed school reported more positive intergroup relations. A longitudinal analysis found that the transition from segregated elementary to mixed secondary schools was associated with Asian British developing more positive intergroup relations. White British reported overall less positive intergroup relations, although only trust decreased; evidence from other measures remains inconclusive. The findings are important for understanding early stages of diversity exposure, and the impact of changing diversity levels on majority and minority groups.     

Critrial noise effects on rule-based category learning: The impact of delayed feedback

Variability in the representation of the decision criterion is assumed in many category-learning models, yet few studies have directly examined its impact. On each trial, criterial noise should result in drift in the criterion and will negatively impact categorization accuracy, particularly in rule-based categorization tasks, where learning depends on the maintenance and manipulation of decision criteria. In three experiments, we tested this hypothesis and examined the impact of working memory on slowing the drift rate. In Experiment 1, we examined the effect of drift by inserting a 5-sec delay between the categorization response and the delivery of corrective feedback, and working memory demand was manipulated by varying the number of decision criteria to be learned. Delayed feedback adversely affected performance, but only when working memory demand was high. In Experiment 2, we built on a classic finding in the absolute identification literature and demonstrated that distributing the criteria across multiple dimensions decreases the impact of drift during the delay. In Experiment 3, we confirmed that the effect of drift during the delay is moderated by working memory. These results provide important insights into the interplay between criterial noise and working memory, as well as providing important constraints for models of rule-based category learning.     

Crossed categorization outside the lab: Findings from a factorial survey experiment

Crossed categorization studies investigate intergroup attitudes in situations when two categorization dimensions are simultaneously salient, often looking at artificial groups in laboratory settings. The current study tests (a) patterns of evaluation in crossed categorization scenarios when more than two real-life categorization dimensions are crossed, and (b) the moderating role of identity importance. We conduct a factorial survey experiment with a diverse sample (N = 524), crossing eight categorization dimensions. The results provide strong support for the additive pattern of crossed categorization, challenging the view that with an increased number of categories category-based information processing will not be used. Identity importance predicts the strength of intergroup bias only on the dimension of religion, which was the dominant dimension in this sample. The study contributes to multiple and crossed categorization literature by testing some of its key assumptions using a design that increases the ecological validity of the findings.     

Explaining Gender‐Based Language Use: Effects of Gender Identity Salience on References to Emotion and Tentative Language in Intra‐ and Intergroup Contexts

An experiment tested hypotheses derived from self‐categorization theory’s explanation for gender‐based language use. Under high or low conditions of gender salience, men and women sent e‐mail to an ostensible male or female recipient yielding either an intra‐ or an intergroup setting. Gender salience was manipulated so that the stereotypically feminine characteristic of supportiveness was the sole attribute that defined the prototype of intergender relations. Messages were examined for references to emotion and tentative language. Women referenced emotion significantly more than men in the high gender salience condition, but this gender difference was reduced when salience was low. Moreover, women with high gender salience in an intergroup context referenced emotion more than women with high salience in an intragroup setting or men with high salience in either an intra‐ or an intergroup context. Tentative language use, however, was similar across all conditions as anticipated.     

Towards tolerance: Representations of superordinate categories and perceived ingroup prototypicality

According to Mummendey and Wenzel (1999), group members tend to perceive their ingroup, relative to an outgroup, as more prototypical of the superordinate category encompassing both groups. Hence, they tend to regard the outgroup as deviating from the norms of the superordinate category. Factors that inhibit perception of relative ingroup prototypicality should thus promote intergroup tolerance. In two experiments, the representation of the superordinate category was manipulated. Both an undefinable prototype (Experiment 1; N=63) and a complex representation (Experiment 2; N=88) led to a decrease in relative ingroup prototypicality. Dual identification with the ingroup and the superordinate category increased relative ingroup prototypicality, which was negatively correlated with positive attitudes towards the outgroup. The findings supported Mummendey and Wenzel’s assumptions about the conditions that lead to intergroup tolerance.     

Considering multiple criteria for social categorization can reduce intergroup bias

Two experiments tested the notion that considering multiple criteria for social categorization can reduce intergroup bias. In both experiments, participants were required to consider alternative ways in which people could be classified, other than an initially salient intergroup dichotomy. In Experiment 1, the authors found that generating alternative social classifications that were unrelated to an initial target dichotomy reduced intergroup bias compared to a control condition. In Experiment 2, this effect was replicated and the authors found that unrelated, but not related, categorizations were necessary to reduce bias. This article adds support to the view that increasing categorical complexity is a useful tool in bias reduction. These findings are discussed in the context of a developing model of multiple categorization effects.