The Effects of State Brooding and Emotional Stimuli on Retrieval-Induced Forgetting

[Speaker] Sato, Hideki:1
[Co-author] Ito, Risa:1, Higami, Koyo:1, Matsumoto, Satomi:1, Namiki, Nobutaka:1, Yajima, Ryo:1, Suzuki, Shin-ichi:1
1:Waseda University (Japan)

Previous research has shown that individuals who tend to ruminate about dysphoric moods have difficulties with inhibitory processes in working memory and long-term memory (LTM) (Joormann, 2006; Whitmer & Banich, 2010). This study aimed to determine (1) whether state brooding, that is, negative components of state rumination, affect inhibitory processes in LTM by experimentally manipulating state brooding and (2) whether state brooding and emotional stimuli affect these processes. To examine inhibitory processes in LTM, we used a retrieval-induced forgetting paradigm. In this paradigm, the practiced retrieval of certain memories causes the inhibition of related but unpracticed memories. In our non-clinical population (N = 40), reduced inhibition processing was associated with state brooding. However, the interaction between state brooding and emotional stimuli was not associated with reduced inhibition processing. These findings suggest that regardless of emotional stimuli, inhibitory deficits in state brooding affect the retrieval of information from LTM.
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