Well fed subjects role-played either food-deprived or food-satiated participation in a classical conditioning of attitudes study. Subjects who role-played deprivation and indicated awareness of the hypothesis that deprivation would lead to increased liking for nonsense syllables paired with food words liked the syllables more than satiation-aware, unaware, and control subjects, who did not differ in their liking. The results were interpreted as supporting a demand characteristics explanation of the deprivation-satiation effect found by Staats, Minke, Martin, and Higa (1972). Staats (e.g., 1967) proposed a theory of attitude acquisition and function derived from the principles of classical conditioning in which an originally neutral stimulus, after repeated pairing with-a stimulus .