A total of 51 Wechsler Intelligence Scale for Children, Fourth Edition (WISC-IV) protocols, administered by graduate students in training, were examined to obtain data describing the frequency of examiner errors and the impact of errors on resultant test scores. Present results were generally consistent with previous research examining graduate…

This study investigates the convergent relations of the Reynolds Intellectual Assessment Scales (RIAS) and the Wechsler Intelligence Scale for Children--Fourth Edition (WISC-IV). Data from counterbalanced administrations of each instrument to 48 elementary school students referred for psychoeducational testing were examined. Analysis of the 96…

Working memory is the cognitive ability to hold a discrete amount of information in mind in an accessible state for utilization in mental tasks. This cognitive ability is impaired in many clinical populations. There have been a number of theoretical shifts in the way that working memory is conceptualized and assessed in the experimental…

No reliable IQ differences were found when the Stanford-Binet was administered to 100 4-year-old Negro children under two conditions of language (Standard English and Negro dialect) and two conditions of reinforcement (praise and candy). (Author/WY)

This dissertation argues that changing ideas about race and engagement with race science were at the heart of a major transformation of political science in the 1920s, a transformation that I characterize as "becoming modern." This transformation was at once conceptual--visible in the basic categories and theoretical apparatus of the…

The impurity of measures is considered as cause of erroneous interpretations of observed relationships. This paper concentrates on impurity with respect to the relationship between working memory and fluid intelligence. The means for the identification of impurity was the fixed-links model, which enabled the decomposition of variance into…

This fact sheet provides answers to frequently asked questions about psychological evaluations for infants, children and adults who are deaf-blind, we hope to clarify the evaluation process and the active roles that may be taken by everyone who is involved--family members, professionals, educators, and the student. Finally, by discussing quality…

The purpose of this study was to assess the effects of the instruction method "Thinking Actively in an Academic Context" (TAAC) in the thinking skills of 6th grade students in primary education. The sample consisted of 58 subjects, aged between 11- and 13-years-of-age, 27 in the experimental group and 31 in the control group. A pre-test…

College Ss were twice administered both on IQ test and a test opinion scale in counterbalanced orders. The Ss received differential feedback before the second administration. Feedback significantly affected subsequent retest IQ test scores and opinion scale scores. It was concluded that when the testing is viewed as a complex interaction of…

Two pilot studies (n"1=155, n"2=451) are presented in this article, which were carried out within the development of an item generator for the automatic generation of figural matrices items. The focus of the presented studies was to compare two types of item designs with regard to the effect of variations of the property ''perceptual…

Just as body symmetry reveals developmental stability at the morphological level, general intelligence may reveal developmental stability at the level of brain development and cognitive functioning. These two forms of developmental stability may overlap by tapping into a ''general fitness factor.'' If so, then intellectual tests with higher…

We studied the age-related differences in inspection time and multiple cognitive domains in a group of monozygotic (MZ) and dizygotic (DZ) twins aged 7 to 17 years. Data from 111 twin pairs and 19 singleton siblings were included. We found clear age-related trends towards more efficient visual information processing in older participants. There…

Meta-analyses are presented of sex differences in (1) the (mental) arithmetic subtest of the Wechsler intelligence tests for children and adolescents (the WISC and WPPSI tests), showing that boys obtained a mean advantage of 0.11d; (2) the (mental) arithmetic subtest of the Wechsler intelligence tests for adults (the WAIS tests) showing a mean…

A structural equation modeling method for examining time-invariance of variable specificity in longitudinal studies with multiple measures is outlined, which is developed within a confirmatory factor-analytic framework. The approach represents a likelihood ratio test for the hypothesis of stability in the specificity part of the residual term…