Performance of the Wisconsin Card Sorting Test (WCST) and related brain-activation patterns reflect both task learning and execution. Normal subjects learned the WCST prior to performance during slow SPECT ligand infusion. Blood flow increased in bilateral inferior frontal, right middle and inferior parietal cortices. Activity decreased in hippocampi, temporal cortex, anterior cingulate and cau...

AIMS To compare the performance of schizophrenia, mania and well control groups on tests sensitive to impaired executive ability, and to assess the within-group stability of these measures across the acute and subacute phases of psychoses. METHOD Recently admitted patients with schizophrenia (n = 36), mania (n = 18) and a well control group (n = 20) were assessed on two occasions separated by...

It is well established that performance on the Wisconsin Card Sorting Test (WCST) tends to decline with advanced age, but the reason for this decline has not been established. The objective of the present study was to clarify this question using a qualitative approach to the task. The WCST was administered to 19 older adults and 25 younger participants. In addition to standard testing procedure...

The Wisconsin card-sorting test (WCST) is a commonly used clinical tool for the detection of frontal lobe dysfunction, specifically executive dysfunction. Patients with lesions outside the frontal lobes sometimes show deficits on the WCST, however, and some researchers have implicated hippocampal dysfunction as the cause of the deficit. But a critical role for the hippocampus seems to be untena...

The Wisconsin Card Sort Task (WCST) is a commonly used neuropsychological test of executive or frontal lobe functioning. Traditional behavioral measures from the task (e.g., perseverative errors) distinguish healthy controls from clinical populations, but such measures can be difficult to interpret. In an attempt to supplement traditional measures, we developed and tested a family of sequential...

Executive function is a fundamental component of the human cognitive architecture. Here, we investigate the relationship between executive function and scientific reasoning. Eighth graders completed measures of three executive functions (EFs): shifting, inhibiting, and updating. They also completed a measure of cognitive flexibility, the Wisconsin Card Sort Task (WCST), that has predicted scien...

1 The Wisconsin Card Sort Task (WCST) is a commonly used neuropsychological test of 2 executive or frontal lobe functioning. Traditional behavioral measures from the task 3 (e.g., perseverative errors) distinguish healthy controls from clinical populations, but such 4 measures can be difficult to interpret. In an attempt to supplement traditional measures, 5 we developed and tested a family of ...

The Wisconsin Card Sorting Test (WCST) is the standard task paradigm to detect human frontal lobe dysfunction. In this test, subjects sort card stimuli with respect to one of three possible dimensions (color, form and number). These dimensions are changed intermittently, whereupon subjects are required to identify by trial and error a new correct dimension and flexibly shift cognitive set. We d...

Background. Differentiating between schizophrenia and major depression with psychotic features often reveals diagnostic dilemma. Both share psychotic features and severe impairment in occupational functions. Severe psychomotor retardation, not uncommon in psychotic depression, may simulate negative symptoms of schizophrenia. Our work aims at utilizing Wisconsin Card Sorting Test (WCST) performa...

the wisconsin test card sorting test (wcst) is a neuropsychological test that has been suggested as a more specific test for frontal lobes dysfunctions. this study was designed to determine whether wcst is able to differentiate between iranian psychiatric patients with cognitive disorders and normal subjects, and whether wcst scores are related to severity of symptoms in depressive and schizoph...