The depth of a group's personality resources: Impacts on group process and group performance

The present study examines the productivity of task groups in relation to the personality resources of its members and its two dimensions of group process: task focus and shared exchange. It is hypothesized that the depth of a group’s personality resources impacts upon productivity both directly through the application of its member’s personality resources to successful group outputs, and indirectly through the mediating agency of group process variables that also contribute separately to successful group outputs. To test these hypotheses, the performance of 43 groups in a 3‐month social psychology class was measured across three course assignments. This averaged performance score was related to the groups’ process scores and to their total levels of personality resources measured by a comprehensive personality inventory administered at the beginning of the groups’ life. Using multiple regression, we found that a group’s performance was predicted by total member intellect, openness (negatively), and emotional stability (negatively). Blocked regression revealed that group intellect exercised a direct effect upon group performance, but that the effects of group openness and group emotional stability on performance were mediated through the group’s two group processes of task focus and shared exchange. It is hoped that this demonstration of a two‐step approach to studying the impact of group member’s personality through its direct effects on group performance and its indirect effect on performance‐linked aspects of group process will be extended to other types of personality measures, and to other types of groups addressing different tasks in other cultural settings.