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According to the extended contact hypothesis, direct intergroup contact is not necessary for prejudice reduction; it suffices to know that ingroup friends have outgroup friends. However, extended contact is typically measured in a way that does not clarify whether people know the outgroup friend of their ingroup friend or whether they are even direct friends. A social network approach is used to compare extended contact when ingroup friends' outgroup friends are not direct friends (open triads) to when there is a direct friendship with some (mixed triads) or all of the ingroup friends' outgroup friends (closed triads). Results from a nonprobability sample in the US predicting feelings toward Black people ( N = 313) and from a representative sample in the Netherlands predicting attitudes toward immigrants ( N = 818) show that extended contact reduces prejudice only when some of the outgroup friends of one's ingroup friends are known. This suggests that the extended contact effect should not be interpreted as providing a solution for situations where direct contact with outgroup members is not possible.

This study tests how the density of the social network in which intergroup contact takes place might affect the extent to which contact improves intergroup attitudes. Having contact with more outgroup members in dense social networks, in which everybody knows each other, may reinforce contact's positive effect. In this case, outgroup contact is shared with ingroup members, which suggests positive ingroup norms toward the outgroup. Alternatively, more contact in denser networks may improve intergroup attitudes less because density may increase subtyping or reduce the salience of ethnic group memberships. These competing hypotheses are tested among white American adults in a nonprobability online sample (N = 305) and in a representative national sample (N = 1270). In both studies, contact is associated with more positive attitudes toward racial outgroups but the positive contact effect is weakened if that contact takes place in a denser social network.

Research has found that prejudiced people avoid friendships with members of ethnic outgroups. Results of this study suggest that this effect is mediated by a social network process. Longitudinal network analysis of a three-wave panel study of 12- to 13-year-olds (N = 453) found that more prejudiced majority group members formed fewer intergroup friendships than less prejudiced majority group members. This was caused indirectly by the preference to become friends of one's friends' friends (triadic closure). More prejudiced majority members did not have a preference for actively avoiding minority group members. Rather, they had the tendency to avoid friends who already had minority group friends and thus could not be introduced to potential minority group friends. Instead they became friends with the majority group friends of their friends. This research shows how a social networks perspective can further our understanding of the processes underlying intergroup contact.

Survey respondents have been found to systematically overreport their participation in political elections. Although the sociodemographic correlates of this response bias are well known, only a few studies have analysed the determinants predicted by two prominent theoretical explanations for vote overreporting: memory failure and social desirability (SD) bias. Both explanations have received empirical support in studies in which the probability of vote overreporting was found to increase (a) with the time between the election and the survey interview and (b) when respondents were politically involved to a larger extent. In the present paper, we argue that the effect of each of these determinants is not simply additive but depends on the value of the respective other factor. This interaction effect has been found with data from the American National Election Studies: The probability of vote overreporting increases significantly more strongly with the respondents' political involvement when more time has elapsed since the election day. Copyright (c) 2007 John Wiley & Sons, Ltd.

Egocentric network studies and many general population surveys rely on proxy reports about network contacts of study participants that are asked in name interpreter questions. A central concern is the extent to which proxy reports match the answers these contacts would give themselves if they would be directly interviewed. Based on the theory of survey satisficing, the present research proposes a theoretical framework that allows predicting when proxy reports are likely to match self-reports. Congruence is higher if respondents possess the motivation and ability to answer a proxy question effortfully, and if the task is not too difficult. Moreover, the theory of survey satisficing states that motivation, abilities, and task difficulty are not independent of each other, which provides an explanation for inconsistent findings in the literature. Results from two egocentric network studies study among German adults (N = 756) and among Dutch middle school students (N = 679), in which network contacts were also interviewed, are in line with these hypotheses. Design recommendations for egocentric network studies are provided.

Egocentric network studies and many general population surveys rely on proxy reports about network contacts of study participants that are asked in name interpreter questions. A central concern is the extent to which proxy reports match the answers these contacts would give themselves if they would be directly interviewed. Based on the theory of survey satisficing, the present research proposes a theoretical framework that allows predicting when proxy reports are likely to match self-reports. Congruence is higher if respondents possess the motivation and ability to answer a proxy question effortfully, and if the task is not too difficult. Moreover, the theory of survey satisficing states that motivation, abilities, and task difficulty are not independent of each other, which provides an explanation for inconsistent findings in the literature. Results from two egocentric network studies study among German adults (N = 756) and among Dutch middle school students (N = 679), in which network contacts were also interviewed, are in line with these hypotheses. Design recommendations for egocentric network studies are provided.

This study (1) tested the effectiveness of a new survey tool to collect ego-centered network data and (2) assessed the impact of giving people feedback about their network on subsequent responses. The new tool, GENSI (Graphical Ego-centered Network Survey Interface), allows respondents to describe all network contacts at once via a graphical representation of their networks. In an online experiment, 434 American adults were randomly assigned to answer traditional network questions or GENSI and were randomly assigned to receive feedback about their network or not. The traditional questionnaire and GENSI took the same amount of time to complete, and measurements of racial composition of the network showed equivalent convergent validity in both survey tools. However, the new tool appears to solve what past researchers have considered to be a problem with online administration: exaggerated numbers of network connections. Moreover, respondents reported enjoying GENSI more than the traditional tool. Thus, using a graphical interface to collect ego-centered network data seems to be promising. However, telling respondents how their network compared to the average Americans reduced the convergent validity of measures administered after the feedback was provided, suggesting that such feedback should be avoided.

How can we reduce ethnic friendship segregation in ethnically heterogeneous schools? The Common Ingroup Identity Model suggests that interethnic friendships are promoted by those intervention programs that focus on the interests students have in common. The authors argue that the outcome of these common interest interventions may crucially depend on sufficient consensus in participants' opinions regarding the shared interest. Such an intervention may backfire and increase ethnic segregation if participants from different ethnic groups have different opinions about the common interest. The authors test their argument analyzing the dynamics of friendship networks and opinions in 48 school classes with an actor-based stochastic model. Their findings suggest that salient common interests in ethnically mixed school classes can indeed reduce ethnic segregation. However, they also found that friendship selection on the basis of similar opinions can foster ethnic segregation. This occurred when ethnicity was correlated with the opinions that students held regarding the salient interest, even when these students did not prefer intra-ethnic friendship per se.

Rising religious violence makes it imperative to develop strategies to foster and preserve interreligious peace. We examine the role of descriptive and injunctive pro-mixing ingroup norms in explaining interreligious contact and, indirectly, more favorable interreligious attitudes. Ingroup norms have been argued to affect intergroup contact independently of individual preferences through mechanisms of social control, and indirectly via internalization of the norms in one's own preferences. However, the relation between ingroup norms and individual preferences is rarely investigated, and it is unknown whether these two mechanisms matter differently for positive and negative contact. We conducted two studies (N1 = 678, N2 = 1,831) in Togo and Sierra Leone to determine whether ingroup norms predict positive and negative interreligious contact directly, indirectly via individual preferences, or via both mechanisms, and how this then translates to intergroup attitudes. We also explored whether the processes were comparable between countries and for religious majority and minority members. We found that descriptive and injunctive norms both mattered for interreligious contact. While for descriptive pro-mixing norms direct mechanisms of social control were more pronounced, injunctive norms were related to interreligious contact and attitudes via preferences for similar others through internalization processes.
Data were collected as part of the project 'Religion for Peace: Identifying Conditions and Mechanisms of Interfaith Peace' conducted at the German Institute for Global and Area Studies funded by the German Research Foundation - Datenfile Version 1.0.0, https://doi.org/10.7802/2607

Research has shown that adolescents' intergroup attitudes are subject to friends' influence, but it remains unknown if certain friends are more influential than others. Popular adolescents may be especially influential of their friends' intergroup attitudes because they can set peer norms. We examined several indicators of popularity in social networks as possible determinants of social influence: sociometric popularity, prestige popularity, being a clique leader, and frequency of contact with friends. Longitudinal analysis of adolescents' friendship networks (12–13 years, N = 837) allowed estimating influence of friends on adolescents' intergroup attitudes, while controlling for the tendency of adolescents to befriend peers with similar intergroup attitudes. Results showed that adolescents' intergroup attitudes changed in the direction of friends' intergroup attitudes. Only peers who are popular in terms of having many friends (sociometric popular) were especially influential of their friends' intergroup attitudes. These findings may inform future interventions aiming to reduce prejudice.

This study examines whether negative contact with immigrants promotes voting for radical right‐wing parties, to what extent this relationship can be explained by feelings of outgroup threat, and whether this relationship depends on perceived personal and collective self‐efficacy. Hypotheses were tested among 630 native Dutch respondents, mainly living in multicultural neighborhoods. The results show that negative contact with immigrants is associated with feelings of personal (egocentric) and group (sociotropic) threat, and both these feelings, in turn, are associated with radical right‐wing voting. However, negative intergroup contact is less strongly related to egocentric threat when individuals feel able to personally address negative situations with other people (personal self‐efficacy). Furthermore, the findings suggest that negative intergroup contact is less strongly related to sociotropic threat when individuals believe that people in their neighborhood are able to collectively address some negative situations (collective self‐efficacy).

Research on the influence of the number of ethnic minority group classmates on majority group students' interethnic attitudes produced conflicting results. With data from 728 early adolescents, we found that the effect of the ethnic class composition depends on two opposing student-level mechanisms. First, majority group students who liked a larger number of minority group classmates developed more positive attitudes toward minority groups. Second, students who disliked a larger number of outgroup classmates developed more negative outgroup attitudes. In our sample, these two effects neutralized each other because the sample consisted of about the same number of students that liked most of their outgroup classmates and students that disliked most outgroup classmates. Results were consistent in cross-sectional and longitudinal analyses. These results support a new interpretation of the mixed findings in past research, suggesting that past studies may have differed in the number of students who liked and disliked outgroup classmates.