Ackerman and Jahoda’s anti-Semitism study relied on only twenty-seven analyst-described cases.

Evidence

Nathan Ackerman and Marie Jahoda, the authors of Anti-Semitism and Emotional Disorder, assisted by Alvin Gouldner and others, did not follow Horkheimer’s plan to carry out a large-scale inquiry on the basis of information supplied by experts, in which numerous psychoanalysts were to be interviewed on cases of patients who were affected by anti-Semitism. They restricted themselves instead to twenty-seven cases suggested by psychoanalysts, who described their patients in detail during interviews. — Rolf Wiggershaus, The Frankfurt School, 1832