OBJECTIVE Studies using the Iowa Gambling Task (IGT) have distinguished between good and bad decision makers and have provided an explanation for deficits in decision making. Previous studies have demonstrated a link between Wisconsin Card Sorting Test (WCST) performance and IGT performance, but the results were not consistent and failed to explain why WCST performance can predict IGT performan...

Executive functions (EFs) measures of 27 asthmatic children, with general learning difficulties, were tested by using the Wisconsin card sorting test (WCST), and were compared to the performances of 30 non-asthmatic children with general learning difficulties. The results revealed that the asthmatic group has poor performance through all the WCST psychometric parameters and especially the perse...

Fifty patients of depression and thirty normal subjects were assessed using clinical rating scales and also for the executive functions by Wisconsin Card Sorting Test (WCST). The depressed subjects demonstrated poor performance on WCST suggesting cognitive inflexibility and prefrontal dysfunction. More severe illness was associated with greater impairment in the executive functioning. This patt...

OBJECTIVE The Val158Met polymorphism of the catechol-O-methyltransferase gene has been demonstrated to be associated with prefrontal executive function explaining 4% of variance in perseverative errors on the Wisconsin Card Sorting Test (WCST). Studies suggest that dopamine D(1) and D(3) and serotonin 5-HT(2A) and 5-HT(6) receptors may also be involved in prefrontal cognitive function and that ...

Purpose: The aim of this study is to examine the relationship between thyroid hormone levels and positive, negative, general, cognitive symptoms in euthyroid patients with psychosis.
 Materials Methods: Thirty-three schizophrenia were included cross-sectional study. Sociodemographic clinical data participants, positive negative assessment scale (PANSS), general functionality (GAF), global ...

Abstract Executive function (EF) is a concept widely used to describe higher order cognitive functioning. However, the seems lack precise definition upon which even experts in area can agree. Examples of existing definitions EF as capacities for independent self-serving behavior and aspects working memory, planning organizational skills. It has been argued that too imprecise, terms informing ef...