This investigation extended work on the Wechsler Adult Intelligence Scaled-Revised (WAIS-R) to the WAIS-III by determining how allotments of scaled-score points change with age, and to evaluate WAIS-III performance in terms of the Horn-Cattell constructs of crystallized and fluid intelligence. The age norms for the 14 individual WAIS-III subtests indicate that additional scaled-score points are...

The primary purpose of the study was to contribute to the validation of a recently developed test of functional abilities, the Bay area Functional Performance Evaluation (BaFPE). On the premise that aspects of intelligence influence functional performance, three subscales of the Wechsler Adult Intelligence Scale (WAIS) were administered, in conjunction with the BaFPE task-oriented assessment (T...

Neuropsychological studies show impairment in intellectual functions in schizophrenia patients. It is still unclear, however, whether intelligence scores decline progressively during the illness as compared to healthy subjects' scores. Longitudinal studies conducted so far have been restricted to relatively short time spans. The aim of this study is to investigate whether changes in intelligenc...

Background: Various studies have documented age-related changes in cognitive abilities and neural basis. Objectives: To investigate the role of neuropsychological function tests in predicting amnestic mild cognitive impairment in the elderly. Materials & Methods: In this cross-sectional study with a correlational design, the study population included elderly people over 60 years old residing ...

BACKGROUND AND PURPOSE This prospective study investigated whether surgery for unruptured intracranial aneurysms (UIAs) affects cognitive function and cerebral blood flow (CBF). METHODS Cognitive tests using the Wechsler Adult Intelligence Scale-Revised, Wechsler Memory Scale, Rey-Osterrieth Complex Figure test, and CBF measurements using single-photon emission computed tomography were perfor...

The purpose of the study reported here was to build regression equations for the estimation of premorbid IQ from demographic variables in a UK population. Subjects (n=151) free of neurological, psychiatric or sensory disability, were administered the Wechsler Adult Intelligence Scale (WAIS) and had their demographic details recorded (age, sex, occupation and education). WAIS Full Scale (FSIQ), ...

The gains of scores on standardized intelligence tests (i.e., Flynn effect) have been the subject of extensive debate concerning their nature, causes, and implications. The aim of the present study is to investigate whether five intelligence tests are measurement invariant with respect to cohort. Measurement invariance implies that gains over the years can be attributed to increases in the late...

Field dependence and spatial ability are widely thought of as distinct psychological dimensions. We sought to evaluate the alternative hypothesis that these are, in fact, different labels for a common underlying dimension. A sample of 60 subjects was selected on the basis of scores on a test of spatial ability. These subjects completed two tests of field dependence--the Embedded Figures Test an...