Social identification and permeability of group boundaries

Two experiments were conducted to investigate some of the factors affecting social identification. In Experiment 1 ingroup identification was measured for subjects who were members of high or low status groups with either permeable or impermeable boundaries, and who received high, average or low ability feedback. The main results are that (1) members of high status groups show more ingroup identification than members of low status groups (2) members of low status groups with permeable boundaries identify less with their group than members of low status groups with impermeable boundaries and (3) in low status groups ingroup identification decreases as group members have higher individual ability. In Experiment 2, in addition to manipulating group status and individual ability, permeability was further differentiated into separate possibilities for upward and downward mobility. The most important results of Experiment 2 are that (1) members of high status groups show more ingroup identification than members of low status groups and (2) group members with high individual ability identify less with their group when upward mobility is possible than when upward mobility is not possible. These results are discussed in relation to social identity theory.     

The rowwise correlation between two proximity matrices and the partial rowwise correlation

This paper discusses rowwise matrix correlation, based on the weighted sum of correlations between all pairs of corresponding rows of two proximity matrices, which may both be square (symmetric or asymmetric) or rectangular. Using the correlation coefficients usually associated with Pearson, Spearman, and Kendall, three different rowwise test statistics and their normalized coefficients are discussed, and subsequently compared with their nonrowwise alternatives like Mantel'sZ. It is shown that the rowwise matrix correlation coefficient between two matricesX andY is the partial correlation between the entries ofX andY controlled for the nominal variable that has the row objects as categories. Given this fact, partial rowwise correlations (as well as multiple regression extensions in the case of Pearson's approach) can be easily developed.The author wishes to thank the Editor, two referees, Jan van Hooff, and Ruud Derix for their useful comments, and E. J. Dietz for a copy of the algorithm of the Mantel permutation test.     

Group status,group size and attitude polarization

The influence of group status and group size on intergroup attitude differentiation was investigated. Hypothesized was that members of high status groups would polarize their attitudes more than members of low status group, and that minorities would show greater sensitivity to status differences than majorities. The results show that status affected intergroup differentiation as predicted, while group size did not.     

Social comparison on two dimensions

In this experiment social comparison on two task dimensions has been studied. The subjects received bogus feedback on their performance on two tests, one allegedly measuring creativity, the other alertness. By means of this feedback four relative position conditions were induced: scoring high on both tests, scoring low on both tests, scoring high on creativity and low on alertness, and vice versa. Anticipating either a co-operative or a competitive game, the subjects indicated their preference for one or the other task dimension and also expressed their preference for a comparison person. It was found that, as predicted, the subjects preferred and valued comparison dimensions on which they occupied a favourable position. With respect to preference for a comparison person, compensatory choices were obtained: on the dimension on which the subject performed well, they preferred an inferior other. On the dimension on which they performed poorly, they preferred a superior other. This pattern of choices was found in co-operation as well as in competition. Finally, upward preference was stronger in co-operative than in competitive conditions, particularly on the dimension on which the subject's own score was low. These and other results were discussed in relation to theoretical social comparison notions.     

Coalition formation: Political attitudes and power

In this study 2 theories have been tested: Minimum Range theory (de Swaan, 1970; Leierson, 1970) and Minimal Resource theory (Caplow, 1956; Riker, 1962; Gamson, 1964). In an experimental simulation (Runkel and McGrath, 1972)political attitudes (left, centre and right) and power differences (40 seats in parliament, 30 seats and 20 seats) have been induced. The results suggest that in the beginning of the bargaining process people communicate about the composition of the coalition programme. The minimal range theory may explain this behaviour: parties with more similar ideological interests do coalesce. Later on, one more often bargains about the division of the outcomes, i.e. portfolios. Minimum Resource theory only partly explains the formed coalitions. Minimal winning coalitions, which are predicted by Minimum Resource theory, are formed more often within centre-left-coalitions. This is not the case for centre-right-coalitions. It is discussed that the link between the parity norm and minimal winning coalitions, which is assumed by Minimum Resource theory, possiblv does not hold in this experiment. The parity norm being used by right together with centres strong position leads to the frequent occurrence of minimal winning centre-left-coalitions.     

Effects of Ethnic Diversity: The Position of Minority Workers in Two Dutch Organizations1

This research compares the position of workers of majority and minority ethnic backgrounds in two Dutch organizations (the police force and health care). Both quantitative and qualitative data were gathered. The data do not indicate a consistent difference between majority and minority workers on performance and well-being. This does not mean that they have the same experiences: Most minority workers are confronted with discrimination and negative expectations, and many are in a solo position. Their majority colleagues do not have to face these challenges. The diversity in the group is liked by most respondents, and they see a positive effect of ethnic diversity on the quality of their work. Research findings are compared with the findings of experimental research on ethnically diverse groups.     

Using Personality Item Characteristics to Predict Single‐Item Internal Reliability,Retest Reliability,and Self–Other Agreement

The use of reliability estimates is increasingly scrutinized as scholars become more aware that test–retest stability and self–other agreement provide a better approximation of the theoretical and practical usefulness of an instrument than its internal reliability. In this study, we investigate item characteristics that potentially impact single‐item internal reliability, retest reliability, and self–other agreement. Across two large samples (N = 6690 and N = 4396), two countries (Estonia and The Netherlands), and two personality inventories (the NEO PI‐3 and the HEXACO‐PI‐R), results show that (i) item variance is a strong predictor of self–other agreement and retest reliability but not of single‐item internal reliability; (ii) item variance mediates the relations between evaluativeness and self–other agreement; and (iii) self–other agreement is predicted by observability and item domain. On the whole, weak relations between item length, negations, and item position (indicating effects of questionnaire length) on the one hand, and single‐item internal reliability, retest reliability, and self–other agreement on the other, were observed. In order to increase the predictive validity of personality scales, our findings suggest that during the construction of questionnaire items, researchers are advised to pay close attention especially to item variance, but also to evaluativeness and observability. Copyright © 2016 European Association of Personality Psychology     

Fatigue: relationships with basic personality and temperament dimensions

This study examined the relationships between the Five-Factor-Model (FFM) personality dimensions (Extraversion, Agreeableness, Conscientiousness, Emotional Stability, Openness/Autonomy), the Pavlovian temperament variables (Strength of Excitation, Strength of Inhibition, Mobility), and fatigue. We expected that all these person characteristics would be negatively associated with fatigue. In a survey among persons working at least 20 h a week (N=765), respondents completed a personality questionnaire (the Five-Factor Personality Inventory), a temperament scale (the Pavlov Temperament Survey), and two fatigue questionnaires (the Checklist Individual Strength-20 and the Emotional Exhaustion scale of the Maslach Burnout Inventory). Results indicated that high scores on Autonomy, and low scores on Extraversion, Conscientiousness, Emotional Stability, and Strength of Excitation were, in various combinations, predictors of higher fatigue scores. Agreeableness, Strength of Inhibition, and Mobility did not play a role in the prediction of any fatigue score. In conclusion, personality and temperament dimensions explained significant proportions of the variance in fatigue. It is stated that there is an urgent need for longitudinal studies in order to examine the predictive value of the personality dimensions over time.