Objective: To identify the neurocognitive abilities that relate to word retrieval ability among younger and older adults. Method: Subjects were 30 younger (18-32; M = 19.83) and 30 older adults (60–93; M = 73.77) from the Dallas community who were non-depressed, native English-speakers, without history of brain injury, learning disorder, or neurological disorder. Subjects completed a naming-to-definition task, where they indicated whether they know (K) or don't know (DK) the target word, or are experiencing tip-of-the-tongue (TOT). Subjects then completed four neuropsychological tests: Wechsler Adult Intelligence Scale – Fourth Edition (WAIS-IV) Vocabulary, WAIS-IV Digit Span, Controlled Oral Word Association Test (COWAT), and Animal Fluency. Results: Vocabulary was significantly correlated (p < .01) with retrieval ability overall and within each age group, so we conducted partial correlations controlling for vocabulary. Overall, retrieval success was significantly correlated with phonemic (r = .31, p = .02) and semantic (r = .30, p = .02) fluency, and semantic fluency also correlated with TOTs (r = −.29, p = .03). Among older adults, semantic fluency correlated with retrieval success (r =.40, p = .03) and TOTs (r = −.42, p = .02), phonemic fluency correlated with number of non-retrieved words (r = −.38, p = .04), and age correlated with retrieval success (r = −.50, p = .01). Among younger adults, none of these relationships between cognitive performance and retrieval were significant. Conclusion: These findings suggest these cognitive measures relate differently to retrieval in younger and older adults. Verbal fluency and age predict retrieval ability only among older, but not younger adults.
NEUROPSYCHOLOGICAL DOMAINS: LANGUAGE AND APHASIA
Neurocognitive Correlates of Word Retrieval Ability in Younger and Older Adults
L Fields, A Brown, K Croft Caderao; NEUROPSYCHOLOGICAL DOMAINS: LANGUAGE AND APHASIA
Neurocognitive Correlates of Word Retrieval Ability in Younger and Older Adults. Arch Clin Neuropsychol 2015; 30 (6): 575. doi: 10.1093/arclin/acv047.235
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