The systematic review derived from a multilab collaborative effort and will summarize the available evidence from analog experiments on the effect of post-exposure sleep on (a) intrusion frequency and (b) intrusion-related stress. For this purpose, we will summarize findings based on controlled studies comparing post-exposure sleep versus wakefulness by means of a meta-analysis of aggregated data and based on an individual participant data meta-analysis following a one step approach. Previous findings point in opposite directions and suggest both, a harmful and protective effect of post-exposure sleep. We aim to explain these divergent findings and to examine participant level moderators of the effect of sleep versus wakefulness / sleep deprivation on intrusive memories of analog trauma.

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