 The same study indicates that level of group cohesiveness is insignificant in predicting groupthink occurrence.Park summarizes a study performed by Callaway, Marriott, and Esser (1985) in which groups with highly dominant members "made higher quality decisions, exhibited lowered state of anxiety, took more time to reach a decision, and made more statements of disagreement/agreement".Overall, groups with highly dominant members expressed characteristics inhibitory to groupthink.