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Recall discriminability: Utility of a new CVLT–II measure in the differential diagnosis of dementia

  • DEAN C. DELIS (a1) (a2), SPENCER R. WETTER (a1), MARK W. JACOBSON (a1) (a2), GUERRY PEAVY (a2), JOANNE HAMILTON (a2), ASSAWIN GONGVATANA (a2) (a3), JOEL H. KRAMER (a4), MARK W. BONDI (a1) (a2), JODY COREY-BLOOM (a2) and DAVID P. SALMON (a2)...

Abstract

Memory tests that are in a recall format have almost universally measured accuracy in terms of the number of target items reported by the examinee. However, this traditional scoring method can, in certain cases, result in artificially inflated memory accuracy scores. That is, just as a “yes” response bias and high false-positive rate on recognition testing can artificially inflate a patient's hit rate, so, too, a liberal response bias and high intrusion rate on recall testing can artificially inflate a patient's level of target recall. Recognition tests correct for this problem by using a discriminability measure that provides a single score of hit rate relative to false-positive rate; however, recall tests rarely provide a single score of recall accuracy that corrects for intrusion rate. In the present study, we examined the utility of a new recall discriminability measure that analyzes target recall relative to intrusion rate. Patients with Alzheimer's disease (AD) or Huntington's disease (HD) were administered the CVLT–II, which provides both the traditional measure of target recall and a new measure of recall discriminability. The results indicate that the new recall discriminability measure was superior to the traditional level of target recall measure in distinguishing the recall performance of AD and HD patients. Implications of these results for clinical practice and theories of memory disorder in dementia are discussed. (JINS, 2005, 11, 708–715.)

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Corresponding author

Reprint requests to: Dean C. Delis, Ph.D., Psychology Service (116B), VA San Diego Healthcare System, 3350 La Jolla Village Drive, San Diego, CA 92161. E-mail: ddelis@ucsd.edu

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Keywords

Recall discriminability: Utility of a new CVLT–II measure in the differential diagnosis of dementia

  • DEAN C. DELIS (a1) (a2), SPENCER R. WETTER (a1), MARK W. JACOBSON (a1) (a2), GUERRY PEAVY (a2), JOANNE HAMILTON (a2), ASSAWIN GONGVATANA (a2) (a3), JOEL H. KRAMER (a4), MARK W. BONDI (a1) (a2), JODY COREY-BLOOM (a2) and DAVID P. SALMON (a2)...

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