WAIS-R Reliability and Standard Errors for Persons 75 to 79, 80 to 84, and 85 and Older
- 1 March 1990
- journal article
- research article
- Published by SAGE Publications in Journal of Psychoeducational Assessment
- Vol. 8 (1), 9-14
- https://doi.org/10.1177/073428299000800102
Abstract
Reliability of the WAIS-R for a sample of 226 normal elderly volunteers was determined. Subjects were divided into three age groups: 75 to 79, 80 to 84, and 85 and older. For each group, internal consistency estimates and standard errors of measurement (Sem1), estimation (Sem2), and prediction (Sem3) were calculated for the IQs and subtests. Vocabulary (.96 to .92) was consistently the most reliable subtest, while Picture Arrangement (.71 to .54) and Object Assembly (.74 to .56) were the least reliable. The summary scores were highly reliable, with coefficients for the Verbal Scale that ranged from .97 to .95, for the Performance Scale from .92 to .89, and for the Full Scale from .97 to. 96. It was concluded that the WAIS-R is a reliable instrument for evaluating elderly subjects.Keywords
This publication has 7 references indexed in Scilit:
- On WAIS—R difference scores in a psychiatric sample.Psychological Assessment, 1989
- Confidence intervals for true scores and retest scores on clinical testsJournal of Clinical Psychology, 1986
- Intrasubject Differences in the Wechsler Intelligence Scale for Children-RevisedJournal of Psychoeducational Assessment, 1986
- On interpreting the several standard errors of the WAIS-R: Some further tables.Journal of Consulting and Clinical Psychology, 1983
- Reliability of the WAIS-R with a Mixed Patient SamplePerceptual and Motor Skills, 1982
- Screening Tests for Geriatric DepressionClinical Gerontologist, 1982
- The continuing misinterpretation of the standard error of measurement.Psychological Bulletin, 1979