The development of verbal and nonverbal factorially derived memory measures.

Sets of verbal and nonverbal memory tests were subjected to a factor analysis, and the factor composite scores were used to discriminate between 57 brain-damaged and 34 non-brain-damaged subjects. The derived factors clearly represented verbal and nonverbal factors. The brain-damaged group performed significantly less well on both the verbal and nonverbal factor composite scores. It is suggested that a battery of verbal and nonverbal scales be used to discriminate left and right lateralized brain-damaged patient groups.