PROBLEM
The phenomenon of design rotations on the Bender-Gestalt Test (BG) has received increasing attention. (I-') Griffith and Taylor (a), stressing the need for actuarial statistics for purposes of differential diagnosis, reported the frequencies of rotations by various neuropsychiatric diagnostic groups. Their study of a restricted sample indicated that rotators had a significantly lower mean I& than non-rotators.
In view of this fact, Tolor and Schulberg('l) suggested that it would be appropriate to partial out the effects of intelligence within diagnostic groups in such studies. This recommendation was later underscored by Jernigan's (7 ) report that intelligence and diagnosis, among others, were significant parameters, not only in the production of rotations, but also in the styles of rotation. This paper presents further data on the incidence of BG rotations within diagnostic groups with control of the intelligence variable.
METHOD
The records of all patients who had been administered the BG individually during a 15 year period at the Lyons VA Hospital were reviewed. Those patients were retained as Ss for whom a full scale I& score was available on one of the Wechsler scales. The final sample comprised 952 hospitalized, male, neuropsychiatric patients who, based on their International Classification of Diseases(6) diagnoses, were broadly categorized as follows : Group N , Neurological Disorders (including acute and chronic brain syndrome, diseases of the nervous system, epilepsy, lobotomy) ; Group S, Schizophrenia; Group OP, Other Psychotic Disorders (affective and paranoid reactions)