“…With respect to racial prejudice, all three classical conditioning studies (Tognacci & Cook, 1975;Tursky, Lodge, Foley, Reeder, & Foley, 1976;Tursky, Lodge, & Reeder, 1979) found significant generalization of the conditioned skin conductance response to racially perceived test stimuli. Similarly, both racial prejudice studies that focused on voice stress analysis (Vander Kolk, 1977b, 1978) reported significant findings in the expected direction. In contrast, all three racial prejudice studies that used the pupillary reflex (Collins, Ellsworth, & Helmreich, 1967;Woodmansee, 1970, Studies A and B) found no differential pupillary response to racial stimuli compared to control stimuli.…”