How valid are subjective ratings of prospective memory in mild cognitive impairment and early dementia?

Gerontology
Claire ThompsonHenry Brodaty

Abstract

Prospective memory refers to memory for future intentions and is a critical predictor of functional capacity in late adulthood. For many other cognitive abilities, self- and informant-rated methods of assessment are routinely used to guide clinical decision-making. However, little is known about the validity (and consequently the clinical utility) of subjective reports of prospective memory difficulties. The aim of this study was to compare clinical [mild cognitive impairment (MCI), dementia] and nonclinical older adults (healthy controls) on self- and informant-rated versions of prospective and retrospective memory function, as well as objective measures of prospective memory. Critical here was not only the assessment of between-group differences, but also whether these different methods of assessing memory function would show appropriate convergent and discriminant validity. A total of 138 participants aged between 64 and 92 years, diagnosed with dementia (n=37), MCI (n=48) or no impairment (n=53), were asked to complete self- and informant-rated versions of the Prospective and Retrospective Memory Questionnaire (PRMQ). Participants also completed behavioural measures of global cognitive function [the Mini-Mental State Examin...Continue Reading

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