Building on a recent work of Harrison, Armstrong, Harrison, Iverson and Lange which suggested that Wechsler Adult Intelligence Scale-Fourth Edition (WAIS-IV) scores might systematically overestimate the severity of intellectual impairments if Canadian norms are used, the present study examined differences between Canadian and American derived…

Because of the Flynn effect, IQ scores rise as a test norm ages but drop on the introduction of a newly revised test norm. The purpose of the current study was to determine the impact of the Flynn effect on learning disability (LD) diagnoses, the most prevalent special education diagnosis in the United States. Using a longitudinal sample of 875…

The assessment of cognitive ability in students with the most severe disabilities presents a challenge to the clinicians who are charged with this task. This article is the second of a two-part series that summarizes what is currently known about effective assessment of the cognitive ability of students with significant impairments in order to…

The Slosson Intelligence Test (revised norms) (SIT) and the WISC-R (Wechsler Intelligence Scale for Children-Revised) were compared. Results provide a moderate degree of support for the concurrent validity of the revised SIT norms, using the WISC-R as the criterion. However, the intelligence quotients on the two tests may not be interchangeable.…

Indices of scatter on the WISC-R and McCarthy Scales were examined for 20 educable mentally retarded and 20 learning disabled children in relation to 20 matched controls and to standardization samples. Exceptional children exhibited more subtest scatter and variability than the standardization sample but not more than the control group. (Author/RD)

Past research has suggested memory, writing speed, and paired-associate learning rate to be important in WISC-R (Wechsler Intelligence Scale for Children Revised) coding performance. Suggested that visual perceptual factors also may be important and that coding performance in right-handed persons may be especially sensitive to integrity of the…

Twenty-one studies that reported mean score differences between the Woodcock-Johnson Tests of Cognitive Ability (WJTCA) and the Wechsler Intelligence Scale for Children-Revised (WISC-R) Full Scale are summarized. The differences are found to be minimal and are attributed to data bias and WJTCA's higher correlation with achievement. (EGS)

This critical evaluation of the Slosson Intelligence Test (SIT) determined that the test items are 30 years old, scores are derived from a nonrepresentative norm group, and scores are not interchangeable with other intelligence measures. The paper concludes that the SIT is unsuited for educational decision-making purposes, including screening,…

Noting that the collective stories of special education have grown out of a tradition that, by its nature tends to perpetuate problems, this book examines such narratives and how they influence thinking and belief about intelligence and learning. It begins by examining how the current story of intelligence developed and illustrates some of the…