The perceptual style of processing stimuli (kinesthetic figural aftereffects) by 53 acute psychiatric inpatients was related to disorders in their perceptual experience of the environment and in their formal thought processes (overinclusive and idiosyncratic thinking). Psychiatric patients who reduced incoming stimuli also manifested greater abnormal perceptual experiences and thought disturbances. At the time of hospitalization the schizophrenics reduced incoming stimuli to a greater extent than did the nonschizophrenics and latent schizophrenics.Abstract Teaser