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ERIC Number: EJ835650
Record Type: Journal
Publication Date: 2009-Jun
Pages: 9
Abstractor: As Provided
Reference Count: 0
ISSN: ISSN-0278-2626
Approximate Quantification in Young, Healthy Older Adults', and Alzheimer Patients
Gandini, Delphine; Lemaire, Patrick; Michel, Bernard Francois
Brain and Cognition, v70 n1 p53-61 Jun 2009
Forty young adults, 40 healthy older adults, and 39 probable AD patients were asked to estimate small (e.g., 25) and large (e.g., 60) collections of dots in a choice condition and in two no-choice conditions. Participants could choose between benchmark and anchoring strategies on each collection of dots in the choice condition and were required to use either benchmark or anchoring on all configurations in the no-choice conditions (one per strategy). The benchmark strategy involves visual estimation processes whereas the anchoring strategy involves both enumeration and estimation processes. Results showed that strategy use was influenced by collection, participant, and strategy characteristics. Age-related and dementia-related differences were found in both strategy use and strategy execution. The findings have implications for our understanding of aging effects in approximate quantification, strategic variations in Alzheimer's patients, and sources of cognitive decline during early stages of Alzheimer's disease. (Contains 2 figures and 6 tables.)
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A