Factor structure of the WISC-R in children with traumatic brain injury.

The factor structure of the WISC-R was examined in a sample of 108 children with traumatic brain injury. Principal factor analysis of 11 WISC-R subtests yielded three factors, which were subjected to varimax rotation. The rotated factor pattern suggested the existence of a Verbal Comprehension factor, a Perceptual Organization factor, and a somewhat weaker third factor. The meaning and implications of this third factor are discussed.