Following the publication of the third edition Wechsler scales (i.e., WAIS-III and WMS-III), demographically corrected norms were made available in the form of a computerized scoring program (i.e., WAIS-III/WMS-III/WIAT-II Scoring Assistant). These norms correct for age, gender, ethnicity, and education. Since then, four new indexes have been developed: the WAIS-III General Ability Index, the W...

Hierarchical models of intelligence are highly informative and widely accepted. Application of these models to twin data, however, is sparse. This paper addresses the question of how a genetic hierarchical model fits the Wechsler Adult Intelligence Scale (WAIS) subtests and the Raven Standard Progressive test score, collected in 194 18-year-old Dutch twin pairs. We investigated whether first-or...

Professor Walker’s provocative article strikingly retells the story of the Wechsler revolution in American law books, and its depiction of the larger scholarly significance of the change in textbook materials is quite convincing. Yet it reveals one big lacuna or, to change the metaphor, it has left out its back-story. Much of Walker’s retelling rests on his notion that the pre-Wechsler, pure co...

La psicolingüística inició su desarrollo como ciencia independiente, en Colombia, 1970. Este principio se caracterizó por el estudio de la adquisición del lenguaje desde una perspectiva cualitativa; mientras que empírico estaba relegado. Esta revisión documental tiene objetivo observar panorama actual los estudios psicolingüísticos empíricos Colombia. metodología consistió búsqueda y análisis 5...

BACKGROUND The neurocognitive functioning of patients with schizophrenia is likely to decline at the early stage of the illness. More evidence is needed to determine whether deficits in certain domains of neurocognition precede the onset of illness and can predict the onset of psychosis. METHODS Subjects were recruited from the SOPRES study in Taiwan. A neuropsychological battery including th...

STUDY OBJECTIVES People with insomnia complain of cognitive deficits in daily life. Results from empirical studies examining associations between insomnia and cognitive impairment, however, are mixed. Research is needed that compares treatment-seeking and community-based insomnia study samples, measures subjective as well as objective cognitive functioning, and considers participants' pre-insom...

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 .11d; (2) the (mental) arithmetic subtest of the Wechsler intelligence tests for adults (the WAIS tests) showing a mean male advantage of .47d; (3) the digit span subtest o...