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Recall and stem-completion priming have different electrophysiological correlates and are modified differentially by
1Neuropsychology Laboratory, West Haven Veterans Administration Medical Center, Connecticut 06516.
Journal of Experimental Psychology. Learning, Memory, and Cognition
|November 1, 1990
Summary
This study shows that explicit memory tests, like recall, are affected by remembering or forgetting instructions, unlike implicit memory tests. Brain activity during learning also differed between explicit and implicit memory performance.
Area of Science:
- Cognitive Psychology
- Neuroscience
Background:
- Explicit and implicit memory tests are believed to assess distinct memory aspects.
- Directed forgetting paradigms manipulate memory intentionally.
Purpose of the Study:
- To investigate whether directed forgetting differentially affects explicit and implicit memory tests.
- To examine the neural correlates (event-related brain potentials) of memory encoding under directed forgetting conditions.
Main Methods:
- A study-test procedure was used with 24 participants.
- Participants were instructed to either remember or forget specific words.
- Memory was assessed using free recall, cued recall (explicit), and stem completion (implicit) tests.
- Event-related brain potentials (ERPs) were recorded during the study phase.
Main Results:
- Explicit memory tests (free and cued recall) showed better performance for "remember" words.
- Directed forgetting did not impact performance on the implicit stem completion test.
- ERPs during encoding differed based on subsequent explicit memory performance, but not implicit performance.
Conclusions:
- Encoding processes differ between explicit and implicit memory tests.
- Electrophysiological data support the dissociation between explicit and implicit memory.
- Findings contribute to understanding directed forgetting mechanisms and memory retrieval.