Premium
WAIS‐R short forms: Assessing the statistical significance of subtest differences
Author(s) -
Crawford J. R.
Publication year - 1997
Publication title -
british journal of clinical psychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.479
H-Index - 92
eISSN - 2044-8260
pISSN - 0144-6657
DOI - 10.1111/j.2044-8260.1997.tb01264.x
Subject(s) - psychology , short forms , wechsler adult intelligence scale , psychometrics , statistical analysis , clinical psychology , statistical significance , validation test , developmental psychology , test validity , statistics , cognition , psychiatry , mathematics
Objectives . To assist with analysis, in the individual case, of subtest profiles obtained from WAIS‐R short‐form administrations. Secondly, to offer a method of profile analysis for a full‐length WAIS‐R which is appropriate for use with agegraded scaled scores. Design . The study used a psychometric method for profile analysis (Silverstein, 1982 a ) which deals more effectively than alternative approaches with the problems raised by conducting multiple comparisons. Methods . A formula to compute the standard error of the difference between a subtest and mean subtest scores was applied to nine short forms and the full‐length WAIS‐R. The data used were derived from the WAIS‐R standardization sample. Results . Tables for examining whether there are significant subtest differences in a clients WAIS‐R profile are presented. Conclusions . An elegant method of analysing subtest profiles has been extended to permit its use with WAIS‐R short forms. Guidance on the use of the tables is offered; the distinction between reliable and abnormal differences is highlighted.