Aptitude-treatment interaction research is designed to identify significant disordinal interactions between personological variables and alternative instructional programs. This study was designed to investigate the efficacy of the aptitude treatment interaction design to research seeking to identify differential educational payoff of alternative…

Ability-achievement discrepancies were analyzed using the Woodcock-Johnson Psycho-Educational Battery, WISC-R, and the Peabody Individual Achievement Test administered to a sample of low achievers. Reliabilities of difference scores were moderately high. Reliabilities of differences for devices normed on both the same and different populations…

This comparison of regression discrepancy model results for learning disability identification used published IQ-achievement and reliability coefficients and generic, mean values. Use of mean IQ-achievement values resulted in higher discrepancy rates for a clinical sample. Use of both mean IQ-achievement and reliability values resulted in higher…

A study examined the underlying factor structure of the aptitude tests and work samples being completed by students with educational disadvantages (limited reading and mathematics skills) who were assessed with the current assessment model in the Akron (Ohio) Public Schools. The amount of variance accounted for by the factors was also…

The use of grade equivalent scores contrasted against grade placement is widespread in the diagnosis of dyslexia and other reading disabilities. Discusses difficulties and distortions of this method. Presents an alternative method for reliably determining aptitude/achievement discrepancies. (Author)

This study examined the psychometric characteristics of the Scholastic Aptitude Test (SAT) administered under special conditions for nine handicapped groups. Four psychometric characteristics were studied: level of test performance, test reliability, speededness, and extent of unexpected differential item performance. Psychometric comparisons were…

The use of the Wechsler Intelligence Scale for Children, Third Edition (WISC-III) and its interpretation in educational use are discussed. To measure intelligence, Wechsler believed one must measure the various aptitudes that contribute to the total behavior of the individual. The WISC-III has six verbal subtests and seven performance subtests.…