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Dissociations between procedural and episodic memory: effects of time and aging
D B Mitchell1, A S Brown, D R Murphy
1Psychology Department, Dedman College, Southern Methodist University, Dallas, Texas 75275-0442.
Psychology and Aging
|June 1, 1990
Summary
Older adults show deficits in episodic memory but not procedural memory, suggesting distinct memory systems. Findings support the multiple memory systems framework in aging research.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Human Aging Research
Background:
- The aging process impacts cognitive functions, including memory.
- Understanding age-related memory changes is crucial for interventions.
- The existence and distinctiveness of multiple memory systems remain an active area of research.
Purpose of the Study:
- To investigate age-related differences in episodic and procedural memory.
- To examine the trajectory of memory decline across different retention intervals.
- To explore dissociations between memory systems within individuals.
Main Methods:
- Participants: Young (mean age 20) and older (mean age 71) adults.
- Task: Picture naming and subsequent recognition memory tests at immediate, 1, 7, and 21 days.
- Analysis: Comparison of episodic memory (recognition) and procedural memory (repetition priming) between age groups and across time.
Main Results:
- Episodic memory recognition was significantly lower in older adults and declined over time in both groups.
- Procedural memory (repetition priming) showed no significant age differences.
- Priming declined within 24 hours but remained stable thereafter, unlike recognition.
- Magnitude of priming was similar for remembered and forgotten items, and recognition/priming showed a non-monotonic relation.
Conclusions:
- Episodic and procedural memory systems are differentially affected by aging.
- Findings support a multiple memory systems framework, highlighting distinct neural substrates and aging trajectories.
- These dissociations offer insights into memory consolidation and retrieval processes in aging.
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