The authors studied the effects of an expected source of information on response biases in quasiperceptual task. They found that accuracy of responses as measured by trials to recognition, number of words recognized, and recalled words, was significantly greater for a group which read interpolated material concerning extrasensory perception than for groups which read material emphasizing subconscious factors in learning or articles suggesting the effectiveness of subliminal qualities in learning. The implications of these findings for methodology in perception studies are discussed. From Psyc Abstracts 36:04:4BC58S. (PsycINFO Database Record (c) 2006 APA, all rights reserved)