Allport held people rarely know the true source of their prejudice

Evidence

Perhaps because of his unwillingness to fully embrace psychoanalysis, Allport made passing references to unconscious processes, but gave them limited emphasis in his book. When he did, he downplayed their role. For example, with respect to scapegoat theory, he noted that there could be “a large amount of unconscious mental operation in the individual” (p. 352), but he thought people to be more unaware of the source of their orientation than of their attitude toward the group, observing, “Few people know the real reason for their hatred of minority groups” (p. 352). In his “Inner Conflict” chapter, he concluded that there is “a sizable group who totally lack insight. They are filled with prejudices and deny this fact” (p. 329). — John F. Dovidio, Peter Glick, Laurie A. Rudman, On the Nature of Prejudice, 146

Categorization

• XREF: Connects to vault claims distinguishing modernist (Allport-era) prejudice models from implicit-bias models of the last two decades.
• corroborated: 2 independent passages support this claim — John F. Dovidio, Peter Glick, Laurie A. Rudman, On the Nature of Prejudice: Fifty Years…, 146