Base Rate Data for the WAIS-R: Test-Retest Stability and VIQ-PIQ Differences*

Joseph D. Matarazzo, David O. Herman

Research output: Contribution to journalArticlepeer-review

130 Scopus citations


The data analyzed were the 14 WAIS-R scores from each of the individuals who comprised the WAIS-R standardization sample. Examined was the individual VIQ-PIQ difference from only the initial examination of each of the 1880 subjects, as well as the test-retest change in each of the 14 WAIS-R scores for each of the 119 subjects who were retested. The results revealed that, although the WAIS-R has excellent psychometric reliability as reflected in its standard error of measurement of a VIQ-PIQ difference and its impressively high test-retest Pearson r values, the actual magnitudes of the differences between the VIQ and PIQ assessed in a single examination, or the magnitudes of gain or loss in the 14 scores on retest, for some of these normal individuals were sufficiently high that such base-rate data should be routinely considered by clinical neuropsychologists and other practitioners.

Original languageEnglish (US)
Pages (from-to)351-366
Number of pages16
JournalJournal of Clinical Neuropsychology
Issue number4
StatePublished - Nov 1 1984
Externally publishedYes

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Psychiatry and Mental health


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