Concept formation and concept shifting in frontal lesion and Parkinson's disease patients assessed with the California card sorting test

Mariana Dimitrov, Jordan Grafman*, Ana Helena R Soares, Kimberly Clark

*Corresponding author for this work

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

Concept formation and shifting abilities of 17 frontal lesion (FL) and 8 Parkinson's disease (PD) patients were assessed with the California Card Sorting Test. FL patients demonstrated a significantly greater number of perseverative responses and deficits in strategy planning, strategy initiation, and concept formation and did not benefit from abstract cues in comparison with their matched normal control (NC) participants. PD patients also demonstrated an increased number of perseverative responses under selected conditions in comparison with their matched NCs, but their ability to explain their sorts, to extract and express the sorting principles, and to sort with the help of abstract and concrete cues depended on their general cognitive status.

Original languageEnglish (US)
Pages (from-to)135-143
Number of pages9
JournalNeuropsychology
Volume13
Issue number1
DOIs
StatePublished - Jan 1 1999

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology

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