The common single nucleotide polymorphism (SNP) rs1360780 (C/T) of the FK506 Binding Protein 5 (FKBP5) gene has been reported to be associated with an altered response of the hypothalamic-pituitary-adrenal (HPA) axis and the development of stress-related psychiatric disorders such as posttraumatic stress disorder (PTSD). In the present study, we examined whether this SNP is associated with cogn...

BACKGROUND Impairments in cognitive functioning are common in schizophrenia, and the degree of impairment may be associated with the individual's age at onset of the disorder. AIMS To examine the effect of age at onset on cognitive functioning using the California Verbal Learning Test, sub-tests from the Wechsler Memory Scale-Revised and sub-scales from the Wechsler Adult Intelligence Scale-R...

OBJECTIVE The estimation of a person's intelligence quotient (IQ) by means of psychometric tests is indispensable in the application of psychological assessment to several fields. When complex tests as the Wechsler scales, which are the most commonly used and universally recognized parameter for the diagnosis of degrees of retardation, are not applicable, it is necessary to use other psycho-dia...

The practice of using children's human figure drawings (HFDs) to assess their intellectual ability is pervasive among psychologists and therapists in many countries. Since the first systematic scoring system for HFDs was published in 1926, their continued popularity has led to the development of several revised versions of the test. Most recently, the Draw-A-Person Intellectual Ability Test for...

It has long been speculated that cognitive subtest scatter or variability is a pathognomonic sign. Early researchers hypothesized that subtest scatter would predict scholastic potential or membership in exceptional groups (Harris & Shakow, 1937). In fact, Binet suggested that scattered passes and failures on the Binet-Simon scale were diagnostically significant (Matarazzo, 1985), and Wechsler (...

This research examined two samples of students classified as learning disabled (LD) for evidence of the phenomenon known as the Flynn effect (FE; Flynn, 1999). Triennial test data were collected for two samples. Sample 1 included students tested twice with the Wechsler Intelligence Scale for Children—Third Edition (WISC-III; n 59). Sample 2, the primary data set, included students tested first ...