Abstract
Memory alterations and biases are core features of posttraumatic stress symptoms (PTSS). Although a large number of studies have investigated memory biases associated with PTSS, some inconsistencies remain regarding the nature of the mechanisms behind the threat-related biases observed in prior findings. The present study explored the extent to which inhibitory deficits, both for automatic and controlled processes, can account for these biases. Participants (N = 64) took part in a remember/know recognition procedure for positive, neutral, negative, and trauma-related words associated with negative priming and directed forgetting encoding. Half of the participants had high levels of PTSS (i.e., PCL-5 score > 40) and half had low levels (i.e., total PCL-5 score < 20). As both negative priming and directed forgetting effects are posited to depend on inhibitory abilities, we expected these effects to be absent for trauma-related words in participants with more severe PTSS. Replicating classic memory biases, participants with high levels of PTSS produced more "remember" recognition responses for trauma-related words, ηp 2 = .10. However, contrary to our expectations, directed forgetting, ηp 2 = .26; and negative priming effects were...Continue Reading
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