Level and variability of performance on neuropsychological tests

J Clin Psychol. 1979 Apr;35(2):358-63. doi: 10.1002/1097-4679(197904)35:2<358::aid-jclp2270350227>3.0.co;2-i.


Compared non-specific variability across subtests and overall level of performance on the Wechsler Adult Intelligence Scale (WAIS) and the Halstead-Reitan Battery (HRB) for normal, schizophrenic, acute and chronic brain-damaged Ss. Both variability and level of performance measures for each of the two test batteries significantly distinguished normal from abnormal Ss, but the HRB measures were more sensitive. Intra-S variability across subtests had a significant negative correlation with level of performance on the HRB, but not on the WAIS. This correlation could not be accounted for fully by a ceiling effect and was thought to represent in part a characteristic feature of ts performance on the HRB. While WAIS variability appeared to be independent of level of performance, it was not much help in differentiating between the four S groups. It was concluded that non-specific variability across subtests is not a helpful independent measure of neuropsychological function on the two batteries studied.

MeSH terms

  • Adult
  • Brain Damage, Chronic / diagnosis
  • Brain Damage, Chronic / psychology*
  • Humans
  • Psychological Tests*
  • Schizophrenia / diagnosis
  • Schizophrenic Psychology*
  • Wechsler Scales