Running head: AN EFFECT OF AGE ON IMPLICIT MEMORY
نویسندگان
چکیده
Implicit memory tests often reveal facilitated processing of previously encountered stimuli even when they cannot be explicitly retrieved. For example, despite decrements in recognition memory, priming in healthy older adults is often comparable in magnitude to that in young individuals. Such observations are commonly taken as evidence for independent explicit and implicit memory systems. On a picture version of the continuous identification with recognition task (CID-R), we found a reliable age-related reduction in recognition memory while the effect on priming did not reach statistical significance (Experiment 1). Experiment 2 replicated these observations using separate priming (CID) and recognition (R) phases. However, when data are combined across experiments to increase power, we find that the reduction in priming reaches statistical significance. In Experiments 3, 4 and 5 we provide evidence that priming in this task is unaffected by manipulations of test awareness and explicit processing. We conclude that priming in this task, like recognition memory, is reduced in normal aging and that the effect is not driven by differences between groups in explicit processing (‘contamination’). Our results support the view that recognition and priming are driven by a single underlying memory system rather than by multiple systems.
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