An old issue in psychological assessment is to what extent power and speed each are measured by a given intelligence test. Starting from accuracy and response time data, an approach based on posterior time limits (cut-offs of recorded response time) leads to three kinds of recoded data: time data (whether or not the response precedes the cut-off),…

This investigation assessed the ability of the Wechsler Adult Intelligence Scale-Third Edition (WAIS-III) short forms to estimate both index and IQ scores in a large, mixed clinical sample (N = 809). More specifically, a commonly used modification of Ward's seven-subtest short form (SF7-A), a recently proposed index-based SF7-C and eight-subtest…

Reliability of subtest composites corresponding to 46 abilities and influences presented by Kaufman (1979) was examined for the Wechsler Intelligence Scale for Children using standardization sample data (ages 6, 11, and 16). Increasing composite reliability was associated with the number of subtests and inclusion of Verbal Scale subtests in the…

Standardization data based on responses of 616 Puerto Ricans to the Spanish version of the Wechsler Adult Intelligence Scale (D. Wechlser, 1981) reveal reliability data and base rates to assist in evaluating the clinical significance of differences between Performance Intelligence Quotient (PIQ) and Verbal Intelligence Quotient (VIQ).…

Development of an alternate form of Raven's Standard Progressive Matrices Test is described. Reliability analysis with 449 children of differing racial/ethnic backgrounds showed good reliability and comparable predictive validity. The alternate form is a promising research tool. (SLD)