Intrusive Reexperiencing: The Role of Working Memory Capacity and Thought Suppression

Study Overview
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Brief Summary
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This study aims at identifying risk factors for the development of intrusive reexperiencing symptoms. In particular, the investigators examine the influence of working memory capacity and thought suppression on the occurrence of unpleasant memories of a negative experience. Hypothesis: People with high working memory capacities (HWMC) are able to successfully suppress memories of an unpleasant experience (presentation of a distressing movie). In contrast, in people with low working memory capacities (LWMC), attempts to suppress memories of an unpleasant experience inadvertently lead to an increase of these memories. Study phase one: Assessment of working memory capacity in 200 healthy participants by means of a computerized task. Selection of 50 participants with HWMC and of 50 participants with LWMC who participate in study phase two. Study phase two: Presentation of a distressing movie and subsequent assessment of memories of the movie during several days in the daily life of participants. Comparison of 4 groups regarding the frequency of instructions in daily life:(group 1: HWMC participants who are instructed to suppress thoughts of the movie, group 2: LWMC participants who are instructed to suppress thoughts of the movie, group 3: HWMC participants who are instructed to allow the occurence of thoughts of the movie, group 4: LWMC participants who are instructed to allow the occurence of thoughts of the movie)

Official Title
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Intrusive Reexperiencing: The Role of Working Memory Capacity and Thought Suppression

Conditions
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Memory

Intervention / Treatment
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* Other: Show distressing movie and tell half of the two study groups to suppress memories of the movie


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Older than 17 years Exclusion Criteria: Insufficient knowledge of the German language, for the distressing movie arm of the study: Elevated levels of depression or posttraumatic stress symptoms prior to viewing of the distressing movie

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Randomized
Intervention Model: Factorial Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: Screening for working memory capacity<br> | |
| Experimental: Distressing movie<br>A distressing movie is presented to two groups (one group with high and one group with low working memory capacity). For each of the two groups, half of the participants are instructed to suppress thoughts of the movies after viewing it, while the remaining participants are instructed to allow the occurrence of memories of the movie. | Other: Show distressing movie and tell half of the two study groups to suppress memories of the movie<br>* A distressing movie is presented to two groups (one group with high and one group with low working memory capacity). For each of the two groups, half of the participants are instructed to suppress thoughts of the movies after viewing it, while the remaining participants are instructed to allow the occurrence of memories of the movie.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of intrusive memories |  | during one week after viewing the distressing movie | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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intrusive memories