Article: PDF OnlySackeim Harold A.; Putz, Erich; Vingiano, William; Coleman, Eliza; McElhiney, MartinNeuropsychiatry, Neuropsychology & Behavioral Neurology: July 1988 - p 97-110 Buy Abstract Summary Normal elderly adults rated composite facial expressions of happiness, neutrality, and sadness, presented to the left and right visual fields. Ratings were made of the degree to which stimuli expressed happy versus sad affect and subjects were tested on three occasions. Indices of asymmetry in accuracy and response bias were derived, contrasting subject ratings with normative judgments. Consistent asymmetry in response bias was observed, with sad faces rated as relatively sadder in the left than in the right visual field. No asymmetry in accuracy of processing was obtained. The findings highlight the need to separate accuracy from response bias in studies of lateralization of affective processing and suggest that asymmetries in such processing may be specific to emotion categories. © Lippincott-Raven Publishers.