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Retrieval processes supporting judgments of recency.
Kerrie L Grove1, Edward L Wilding
1Cardiff University, Cardiff, Wales, UK. grovekl@cardiff.ac.uk
Journal of Cognitive Neuroscience
|June 20, 2008
Summary
This study reveals that both recollection and familiarity processes, measured by event-related potentials (ERPs), support judgments of recency. Stronger memory signals correlate with judging events as more recent.
Area of Science:
- Cognitive Neuroscience
- Psychology
Background:
- Understanding memory retrieval processes is crucial for explaining how individuals judge the recency of past events.
- The specific roles of distinct memory retrieval processes, such as recollection and familiarity, in supporting time judgments are not fully understood.
Purpose of the Study:
- To investigate the neural underpinnings of judgments of recency (JORs).
- To determine the contribution of different memory retrieval processes to temporal judgments.
Main Methods:
- Event-related potentials (ERPs) were recorded during a verbal memory task with varying lags between word presentations.
- Participants performed continuous judgments of recency (JORs) on re-presented words.
Main Results:
- Two distinct ERP effects were identified that predicted JORs.
- These ERP effects corresponded to neural signatures associated with recollection and familiarity.
- Larger ERP effects consistently predicted judgments of shorter lags (more recent events).
Conclusions:
- Both recollection and familiarity contribute to judgments of recency.
- Memory strength, as indexed by ERP effects, appears to be heuristically used in making recency judgments.
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