A further analysis of the Block Rotation Test

While Satz's Block Rotation Test has shown promise in its ability to detect brain dysfunction, its factorial and psychometric properties have not been investigated extensively. This study investigated the factor structure of the test across two different S groups. In addition, internal reliability and discrimination between patient groups with and without neurological impairment was assessed. Only one factor, which dealt with Time Errors and Age of the patient, was replicated across two separate factor analyses that used different patient populations. Analyses of internal consistency, using a number of different breakdowns, yielded corrected Spearman-Brown coefficients that ranged from .77 to .94. A fourth analysis showed that a simple summation of errors on the two parts of the test could discriminate reliably between different diagnostic patient groups.