Lysergic acid diethylamide (LSD-25) alters size perception of one's own body and objects in space in both schizophrenic and normal adults. The study, grounded in sensory-tonic field theory, shows that changes in organismic state from LSD produce corresponding changes in perception, consistent with the theory that perception reflects the relation between organismic state and external stimuli.
A change in the organismic state induced by the drug LSD-25 affects spatial localization. The study was conducted within the sensory-tonic field theory of perception, which holds that perception depends on relations between stimulus conditions and the organism's state, rather than being an isolated event. LSD-25 produces primitive behavior in normal adults, and the experiment examined how this pharmacological agent alters spatial localization.