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The influence of verbalization versus imagery on trauma memory
Aleksandra E Rupietta1, Thomas Meyer2, Jürgen Margraf1
1Mental Health Research and Treatment Center, Faculty of Psychology, Ruhr-University Bochum, Bochum, Germany.
Background:
Cognitive theories on trauma memory postulate that trauma-related intrusions are associated with more data-driven and less contextual processing. However, contextualisation can be enhanced via verbalization, suggesting that verbalizing traumatic material should reduce the number of intrusions and affect other trauma-relevant symptoms and processes.
Methods:
In this experimental study, participants watched different trauma films and were instructed to verbalize the contents of each film clip, to visually imagine them, or to let their mind wander freely. Intrusions were measured via a diary and an intrusion provocation task applied three days after film presentation. General trauma-relevant symptoms were assessed with the Posttraumatic Symptom Checklist (PCL-5). Thought suppression was measured twice, i.e., before and after the experimental manipulation. During a memory processing task, participants were asked to recall the film clips, and their performance was evaluated based on the number of details they accurately remembered as well as the time it took them to do so.
Results:
No group differences emerged regarding the number of intrusions, PCL-5 scores, memory processing task outcomes, levels of thought suppression, or data driven processing. Exploratory correlational analyses revealed that intrusion frequency (i.e., diary intrusions, provoked intrusions) and PCL-5 scores were positively correlated with thought suppression pre- and post-manipulation.
Conclusion:
The verbalization task did not result in a reduction of intrusions and other trauma-relevant symptoms. However, results further underline the relationship between thought suppression and intrusions.
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