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Strong memories obscure weak memories in associative recognition
Michael F Verde1, Caren M Rotello
1Department of Psychology, Box 37710, University of Massachusetts, Amherst, MA 01003-7710, USA. mverde@psych.umass.edu
Psychonomic Bulletin & Review
|May 7, 2005
Summary
The list strength effect impacts associative memory retrieval, unlike item recognition. This study found that strengthening some memory pairs impaired recalling others in associative tasks.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Memory Research
Background:
- The list strength effect, where strengthening some memories hinders others, is documented in memory retrieval.
- This effect has typically not been observed in item recognition tasks.
- A gap exists in understanding the list strength effect within associative recognition.
Purpose of the Study:
- To investigate whether the list strength effect occurs in associative recognition.
- To explore the nature of memory representation in item versus associative recognition.
Main Methods:
- Utilized overlapping word pairs (e.g., A-B, A-C) as study materials.
- Manipulated list strength by varying presentation frequency: strong pairs (3 repetitions) vs. weak pairs (1 repetition).
- Assessed associative recognition accuracy and response times; analyzed receiver-operating characteristic curves.
Main Results:
- Associative recognition for weak pairs was less accurate compared to baseline pairs.
- Response times for hits were significantly slower for weak pairs.
- Receiver-operating characteristic curve data corroborated findings of impaired accuracy for weak associative pairs.
Conclusions:
- The list strength effect is demonstrable in associative recognition.
- Findings suggest a qualitative difference between item and associative memory recognition processes.
- This supports distinct neural and cognitive mechanisms underlying different memory types.