Cognitive Mechanisms Underlying Mnemonic Discrimination Across Age And Cultural Groups
James Qian, Yu-Ling Chang, Xiaodong Liu, Joshua Goh, Angela Gutchess

TL;DR
The study explores how memory and executive function affect the ability to distinguish similar memories in people of different ages and cultures.
Contribution
The study reveals that executive function compensates for memory decline in younger adults but not in older adults.
Findings
Memory and executive function significantly influence mnemonic discrimination.
Executive function's compensatory role diminishes with age.
Older adults rely more on pattern completion mechanisms.
Abstract
Mnemonic discrimination, differentiating between similar items, declines with age. Declines may result not only from reduced hippocampal function but also from changes in executive function (EF). This study examines how memory and EF contribute to mnemonic discrimination across age and cultural groups. A total of 201 participants (98 Americans: 43 older, 55 younger; 103 Taiwanese: 50 older, 53 younger) completed the Mnemonic Similarity Task (MST) and a culturally adapted neuropsychological battery. The MST consisted of an encoding phase and a recognition phase, in which participants discriminated old items from similar and new items. Exploratory factor analysis derived memory and EF factors from the neuropsychological tests. General linear models examining the effects of memory, EF, age, culture, and two-way interactions on MST performance were significant, F(5, 179) = 21.23, p < .001,…
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Taxonomy
TopicsMemory Processes and Influences · Neurobiology of Language and Bilingualism · Neuroscience and Music Perception
