The current study examines attachment-style differences in responses to inductions of group respect and disrespect. Participants completed a scale assessing attachment anxiety and avoidance, performed group tasks, and received high, average, or low respect feedback from group members. Then we assessed commitment to this group, actual effort expenditure on behalf of the group, and money donation to the group. For participants scoring relatively high on attachment anxiety, high group respect heightened group commitment and effort expenditure on behalf of the group, whereas group disrespect led to lower group commitment but to more money donation to the group and higher effort expenditure. Participants who scored relatively low on attachment anxiety were not significantly affected by group respect or disrespect. The implications of attachment theory for group dynamics were discussed. Copyright © 2008 John Wiley & Sons, Ltd.