Those most likely to have intergroup contact are least likely to change their groups.

Evidence

So, given real differences between groups, those most likely to have intergroup contact are atypical of their groups. Yet contact effects generalize best when the participants are typical group members. Thus, people most likely to engage in intergroup contact are the least likely to evoke changes that generalize to their groups. — Thomas F. Pettigrew, Intergroup Contact Theory, 67

Categorization

• DEEPTHINKING: A genuinely self-undermining structural paradox: the very mechanism that produces contact selects against its own generalization.
• SEED: Essay angle: ‘the contact paradox’ — why every diversity program selects for the people least able to change the institution.