Categorical perception of outgroups triggers amygdala vigilance, individualization relaxes it

Evidence

When people treat the other person categorically on one dimension (age), the amygdala also responds categorically on other dimensions (race). But when people treat the other as a unique individual, the amygdala relaxes its vigilance. — John F. Dovidio, Peter Glick, Laurie A. Rudman, On the Nature of Prejudice, 352

Categorization

• QUESTION: Does category activation on one dimension automatically spread to amygdala responses on otherwise neutral categories like race? What are the boundary conditions?
• XREF: Connects to vault claims on automatic prejudice responses and the person-perception/individuation distinction central to contact-theory models.
• corroborated: 2 independent passages support this claim — John F. Dovidio, Peter Glick, Laurie A. Rudman, On the Nature of Prejudice: Fifty Years…, 352