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The decay of short-term implicit memory: unpacking lag
1Division of Psychology, Australian National University, Australia. elinor.mckone@anu.edu.au
Memory & Cognition
|December 16, 1998
Summary
Short-term implicit memory shows decay influenced by both time and interference. Nonwords are particularly sensitive to interference, explaining lexicality interactions in repetition priming.
Area of Science:
- Cognitive Psychology
- Neuroscience
- Psycholinguistics
Background:
- Repetition priming effects demonstrate implicit memory.
- Short-lived priming decays rapidly, influenced by item type (words vs. nonwords).
- Prior research indicated a lag by lexicality interaction in priming decay.
Purpose of the Study:
- To investigate the mechanisms of short-term repetition priming decay.
- To disentangle the roles of time delay and item interference in priming loss.
- To explain the observed lag by lexicality interaction.
Main Methods:
- Two experiments were conducted using a lexical decision task.
- Experiment 1 manipulated time delay and number of intervening items independently.
- Experiment 2 analyzed priming as a function of time delay, with and without intervening items.
Main Results:
- Both time delay and interference independently contribute to the decay of short-term priming.
- The lag by lexicality interaction is attributed to nonword memory traces being more susceptible to interference.
- Evidence suggests distinct decay pathways for word and nonword representations.
Conclusions:
- Short-term implicit memory decay is a dual-component process involving time and interference.
- Lexicality modulates the susceptibility of memory traces to interference.
- Understanding these decay mechanisms offers insights into word recognition and memory systems.