129 patients with cerebrovascular insufficiency (CVI) were studied on 43 scores from psychological tests of intellectual functioning and 42 scores from physiological measures. BC TRY cluster analysis of 35 psychological variables yielded 3 strong dimensions labeled verbal, visual-motor, and numerical, as well as a weaker dimension labeled attention. These 4 dimensions accounted for 91% of the communality among the 35 psychological variables. The dimensions were fairly highly intercorrelated, and correlated significantly with 10 of the 42 physiological variables, primarily EEG findings. It was concluded that adequate assessment of CVI patients should include, in addition to physiological measures, testing in the identified psychological dimensions of intellectual functioning. Further research planned along these lines was discussed.
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