This study investigates how in-group identification develops during group interaction and forms a dynamic input and output that changes over time. Phase 1 of the study shows how initial level of identification in combination with anticipated changes in the intergroup status hierarchy, predicts subsequent levels of identification. Whereas low identifiers only express solidarity with their group to the extent that the improvement of group status constitutes a likely prospect, high identifiers maintain commitment even if their group faces an uncertain or bleak future. During Phase 2 of the study, it is shown how low and high identifiers respond differently to actual changes in the intergroup status structure. Overall, low identifiers seem more instrumental than high identifiers, in the sense that the former are only prepared to affirm identification with a low status group when status improvement is imminent, or has actually been realized. These results are discussed with reference to social identity theory.