Judgments of origin and generation effects: Comparisons between young and elderly adults.

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Abstract
In 2 experiments, young and elderly adults were required to both read words, and generate words by completing word fragments. Subjects were then required to recognize those words that had been presented earlier; for those words that they recognized they judged whether the items had initially been presented in read or generate form. Generation effects (better memory for words that were generated as compared with words that were read) of similar magnitude were observed for both young and older adults. The older adults were consistently less accurate than the younger adults in their judgments of origin. In addition, the young adults exhibited a bias to respond "read" for these judgments. In contrast, the older adults either exhibited a neutral response bias or were biased to respond "generate." Age-related differences in the encoding or retrieval of information about cognitive operations do not provide a good account of the results. Alternative accounts are described.

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