Revised Approach to Detection of Cerebral Damage: Progressive Matrices Revisited

Abstract

The use of several indices based on Progressive Matrices performances alone fails to differentiate impairment related to psychopathology from that due to cerebral histopathological changes at a satisfactory level, although the test is an excellent indicator of the presence and extent of impairment irrespective of the impairing condition. Since psychiatric and neurological patients overlap most in impaired g-functions and least on certain measures independent of g, the latter are held to be decisive in distinguishing organic from psychopathological impairment whatever the level of intellectual competence at the time of test.