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When priming persists: long-lasting implicit memory for a single episode in amnesic patients
M P McAndrews1, E L Glisky, D L Schacter
1Department of Psychology, University of Toronto, Ontario, Canada.
Neuropsychologia
|January 1, 1987
Summary
Amnesic patients demonstrated durable implicit memory for sentence puzzles, showing robust priming effects even after a week. This challenges previous findings of rapid decay in priming for amnesic individuals.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Memory Research
Background:
- Implicit memory, or unconscious memory, plays a crucial role in cognitive function.
- Amnesia significantly impairs explicit memory (recall, recognition) but the impact on implicit memory is less understood.
- Previous studies suggested rapid decay of priming effects in amnesic patients.
Purpose of the Study:
- To investigate the durability of implicit memory in amnesic patients.
- To examine priming effects for complex sentence puzzles over extended delays.
- To compare implicit memory durability in amnesic versus normal subjects.
Main Methods:
- Utilized sentence puzzles requiring a key word for comprehension.
- Assessed implicit memory through facilitation in solving re-presented sentences.
- Tested participants (normal and amnesic) at retention intervals from one minute to one week.
Main Results:
- Amnesic patients exhibited substantial and robust priming from a single exposure.
- No systematic decay of facilitation was observed in amnesic patients over a one-week interval.
- Implicit memory durability in amnesics for this task contrasted with prior research.
Conclusions:
- Implicit memory for complex material can be remarkably durable in amnesic patients.
- The findings suggest that certain types of implicit memory are resistant to the memory impairments seen in amnesia.
- This study challenges the notion of universally rapid decay of priming effects in amnesic populations.