John F. Dovidio studied how recategorization changes responses to members of another group. Experiments varied whether participants represented two small groups as a more inclusive group and measured evaluations, disclosure and helping. Comparing several outcomes tests whether a change in verbal evaluation also extends to behavior. [ref]
Extending the benefits of recategorization: evaluations, self-disclosure, and helping by John F. Dovidio and others. 1997, inclusive-group manipulation and behavioral outcomes
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