On the basis of the input-process-output model, the present research examined how individual performance, interpersonal attraction, and interpersonal behavior affect group performance in a problem-solving task. 164 participants were assigned to 41 groups, each consisting of four same-sex members. Participants completed a measure of interpersonal attraction and individually solved the established moon-landing task. Afterwards, all group members worked together to find a common solution for this task. Four interpersonal behaviors were recorded on video while the group interacted (cooperative, communicative, coordinative, and conflict behavior). Two main findings emerged: First, on average, groups performed better than the individuals did alone. Second, individual performance, interpersonal attraction, and directly observed interpersonal behaviors were independent predictors of group performance. Furthermore, we found indications that interpersonal behavior might play a mediating role here. The results and their implications are discussed.
A Conceptual Framework for the Prediction of Group PerformanceThe conceptual approach that guided our research was the input-process-output model (Hackman, 1987;McGrath, 1964), which describes important variables that influence group performance (see Figure 1). The input variables are characteristics of the group members and the situation, both of which exist before the group interaction takes place. Inputs can consist of, for example, the average age of a group, cultural diversity, or gender ratio. In the Nikoleizig, L., et al. (2019).