[A study on HTP organic signs]

A special version of the House-Tree-Person (H-T-P) technique was developed to differentiate organic psychosis from other disorders. H-T-P data of 126 psychiatric inpatients, including 16 patients with organic psychoses, 50 schizophrenics, 50 borderlines and 10 patients with other psychoses, were evaluated for the presence or absence of 29 possible features of houses, trees and persons. These features included those common to all three objects, as well as those specific to each object. Results for patients with organic psychoses were compared with those of patients with other disorders. The comparison disclosed that seven of the original 29 H-T-P features had diagnostical discrimination among treatment groups, giving higher H-T-P organic scores.