title: Cognitive Correlates of Perseverations in Individuals with Memory Impairment.
abstract: OBJECTIVE
  This study examines which cognitive measure best accounts for perseverations in individuals with memory impairment.
  
  
  METHODS
  The sample included 85 individuals, of whom 21 had subjective memory concerns, 27 had mild cognitive impairment, and 37 had Alzheimer's disease. Participants produced responses on a semantic category fluency task and on the ideational fluency (IF) task from the Cambridge Cognitive Examination-Revised. Measures of word finding, working memory, and abstract thinking were also assessed.
  
  
  RESULTS
  Significant group differences in percentage of perseverations emerged on both tasks. No cognitive measure accounted for the percentage of perseverations on the semantic fluency task. A measure of abstract thinking was the best predictor of the percentage of perseverations on the IF task, followed by a measure of working memory.
  
  
  CONCLUSIONS
  The underlying cognitive mechanisms that lead to perseverations differ across tasks, with perseverations on the IF task reflecting both conceptual deficits and working memory limitations.
authors.affiliation: Department of Education and Psychology, The Open University, Ra'anana, Israel gkave@012.net.il.
authors.forename: Gitit
authors.initials: G
authors.lastname: Kavé
authors.affiliation: Margoletz Psychogeriatric Center, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.|Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.
authors.forename: Jeremia
authors.initials: J
authors.lastname: Heinik
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D000544:Alzheimer Disease / Q000523:psychology; D003071:Cognition; D060825:Cognitive Dysfunction / Q000523:psychology*; D005260:Female; D006801:Humans; D008297:Male; D008569:Memory Disorders / Q000523:psychology*; D008570:Memory, Short-Term; D008875:Middle Aged; D009483:Neuropsychological Tests; D014705:Verbal Behavior
keywords: Alzheimer's disease; Dementia; Mild cognitive impairment; Verbal fluency