Fluctuations in recall across successive test trials
1University of Washington, 98195, Seattle, Washington.
Memory & Cognition
|November 9, 2013
Summary
Item fluctuation in memory recall is not affected by recall trial duration. However, specific recall instructions can suppress non-requested items without aiding requested items.
Area of Science:
- Cognitive Psychology
- Memory Research
Background:
- Item fluctuation, encompassing intertrial forgetting and spontaneous recovery, is a key aspect of memory performance.
- Understanding factors influencing memory fluctuation is crucial for cognitive science.
Purpose of the Study:
- To investigate if item fluctuation is influenced by the duration of recall trials.
- To examine the impact of demand characteristics, specifically experimental instructions, on item fluctuation.
- To determine the interplay between recall time and instructions on memory recall dynamics.
Main Methods:
- 144 university undergraduates studied a 36-item list.
- Participants completed two successive recall trials with durations of 9, 36, or 144 seconds.
- Instructions for the second recall trial varied: recall only previously recalled items ('old'), only non-recalled items ('new'), or both ('both').
Main Results:
- Recall trial duration influenced the overall quantity of recalled items but did not alter the degree of item fluctuation.
- Instructions to recall only 'old' or only 'new' items led to the suppression of non-requested items.
- This suppression of non-requested items occurred without a concurrent facilitation effect for the requested items.
Conclusions:
- Recall trial duration does not appear to be a significant factor in memory item fluctuation.
- Demand characteristics, through specific recall instructions, can actively suppress certain memory items.
- Memory recall is sensitive to explicit instructions, potentially leading to biased retrieval outcomes.
