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Recognition memory for emotionally negative and neutral words: an ERP study.
E J Maratos1, K Allan, M D Rugg
1Institute of Cognitive Neuroscience and Department of Psychology, University College London, 17 Queen Square, WC1N 3AR, London, UK. e.maratos@ucl.ac.uk
Neuropsychologia
|July 25, 2000
Summary
Emotionally negative words increase false recognition memory due to semantic cohesion, impacting neural activity differently than neutral words. Event-related potentials (ERPs) reveal distinct memory processes.
Area of Science:
- Cognitive Neuroscience
- Psychology
- Neuroimaging
Background:
- Emotional valence influences cognitive processes, including memory.
- Recognition memory involves distinct neural mechanisms like familiarity and recollection.
- Event-related potentials (ERPs) offer insights into the temporal dynamics of neural activity during memory tasks.
Purpose of the Study:
- To investigate the neural correlates of recognizing emotionally negative versus neutral words.
- To examine how emotional valence affects different components of recognition memory, such as familiarity, recollection, and monitoring.
- To understand the behavioral and electrophysiological differences in memory performance for emotional and neutral stimuli.
Main Methods:
- Utilized scalp-recorded event-related potentials (ERPs) during a recognition memory task.
- Presented participants with emotionally negative and neutral words.
- Analyzed behavioral data (e.g., false alarm rates) and ERP 'old/new' effects.
Main Results:
- Negative words showed a higher false alarm rate compared to neutral words.
- Neutral words elicited three distinct ERP memory effects: early frontal (familiarity), left parietal (recollection), and late right frontal (monitoring).
- Negative words showed similar early frontal effects but reduced left parietal effects and absent right frontal effects, attributed to increased positivity for new negative items.
Conclusions:
- Emotional valence, particularly negative, influences recognition memory, increasing false recollection tendencies.
- The findings support the role of 'semantic cohesion' in emotional word processing, leading to 'false recollection' of unstudied items.
- Differential ERP effects for negative words suggest modulation of familiarity, recollection, and post-retrieval monitoring processes.
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