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Memory control ability modulates intrusive memories after analogue trauma.
Markus Streb1, Axel Mecklinger2, Michael C Anderson3
1Division of Clinical Psychology and Psychotherapy, Department of Psychology, University of Freiburg, Freiburg, Germany.
Journal of Affective Disorders
|January 3, 2016
Summary
Individuals with better memory control, specifically retrieval suppression, experience fewer distressing intrusive memories after trauma. Poor memory control may increase the risk of developing posttraumatic stress disorder (PTSD).
Area of Science:
- Cognitive Neuroscience
- Psychology
- Trauma Studies
Background:
- Intrusive memories are common after trauma and impact survivor well-being.
- Effective memory control, particularly retrieval suppression, is crucial for managing these intrusions.
- Impaired retrieval suppression is linked to persistent distress and posttraumatic stress disorder (PTSD).
Purpose of the Study:
- To investigate if individual differences in retrieval suppression ability predict the occurrence of intrusive memories following trauma.
- To examine the relationship between memory control mechanisms and the distress associated with intrusive memories.
Main Methods:
- The study utilized the think/no-think task (TNT) to assess retrieval suppression abilities.
- Participants (n=24) were exposed to a "traumatic" film after completing the TNT task.
- Behavioral and event-related potential (ERP) measures, alongside electronic diary and Impact of Event Scale (IES) assessments, were employed.
Main Results:
- Behavioral measures indicated that higher retrieval suppression ability correlated with lower distress ratings for intrusive memories (r=-.53).
- Event-related potential (ERP) markers, specifically the fronto-central N2 component, predicted reduced intrusion distress (r=-.45) and lower IES Intrusion scores (r=-.56).
Conclusions:
- Lower retrieval suppression ability was associated with less distressing intrusive memories after an analogue trauma.
- ERP correlates of retrieval suppression suggest that deficits in memory control may be a risk factor for PTSD development.
- Further research is needed to validate these findings in real-life trauma scenarios.
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