The problems were whether dissonance can be aroused between 2 cognitions without awareness of 1 of them and whether change in consummatory strength of a motive can be an avenue of dissonance reduction. 40 high school Ss were hypnotized to a depth adequate for assuring amnesia for suggestions. ½ ate sauce that was very thirst arousing (HT), and ½, sauce that aroused little thirst (LT). Placed under hypnosis again, the 20 experimental Ss were told that, on awaking, they would feel water bloated, while the control Ss were told they would feel fatigued. Ss were awakened and offered water. HT experimental Ss drank less water than LT experimental Ss, the reverse of the control group effect (interaction p < .001). (20 ref.) (PsycINFO Database Record (c) 2006 APA, all rights reserved)