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Target strength and retrieval-induced forgetting in semantic recall
Jamie I D Campbell1, Thomas L Phenix
1University of Saskatchewan, Saskatoon, Saskatchewan, Canada. jamie.campbell@usask.ca
Memory & Cognition
|December 24, 2008
Summary
Retrieval-induced forgetting (RIF) impairs memory retrieval. This study shows RIF in semantic memory depends on retrieval practice and is stronger with less practice, supporting inhibition theories.
Area of Science:
- Cognitive Psychology
- Neuroscience
Background:
- Retrieval-induced forgetting (RIF) is a phenomenon where practicing one memory impairs retrieval of related, unpracticed memories.
- Understanding the mechanisms of RIF in semantic memory is crucial for memory research.
Purpose of the Study:
- To investigate whether RIF in semantic memory is retrieval-dependent.
- To examine the effect of practice intensity on RIF in semantic memory.
Main Methods:
- University students either studied or retrieved multiplication facts.
- Participants were subsequently tested on related addition facts.
- Response times were measured to assess retrieval interference.
Main Results:
- Retrieval practice, not study practice, led to slower response times for related addition facts.
- RIF was significantly larger for control addition problems after a single retrieval of their multiplication counterparts compared to massive practice.
- These findings align with inhibition theories, suggesting weaker inhibition when target memory strength is high.
Conclusions:
- RIF in semantic memory is demonstrably retrieval-dependent.
- The magnitude of RIF is inversely related to the strength of the practiced memory, supporting inhibition-based models of forgetting.
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