Variables stemming from standard psychologic tests, psychophysiologic tests, and operant conditioning procedures were employed in assessing the status of 80 psychogeriatric patients with either organic brain syndromes or functional psychoses. Differences were observed in the responses between the two groups. In general, the performance of the patients with organic brain syndromes was more deviant than that of the patients with functional psychoses, and the performance of the hospitalized geriatric patients (regardless of diagnosis) was worse than that of the normal control groups.
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