Cognitive and consensus processes in group recognition memory performance.

Abstract

This experiment applies signal detection theory and social decision schemes to investigate the potential impact of information pooling, error correction, and effective decision-making processes in the general finding that groups perform better than individuals on memory tasks. Groups and individuals completed a true/false recognition test regarding material presented in a videotaped simulated job interview. Various indexes of memory performance indicated that each of the processes contributed to the superiority of group recognition memory performance. Social decision scheme analyses indicated that the plurality-correct-wins decision scheme was the best summary of the decision process. Subsequent analyses suggested that the confidence that group members held in their initial preferences influenced the group decision process. Discussion emphasized the impact of consensus, correctness, and confidence on group memory performance.