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EEG evidence that morally relevant autobiographical memories can be suppressed.

Published version
Peer-reviewed

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Authors

Satish, Akul 
Hellerstedt, Robin 
Anderson, Michael C 
Bergström, Zara M 

Abstract

Remembering unpleasant events can trigger negative feelings. Fortunately, research indicates that unwanted retrieval can be suppressed to prevent memories from intruding into awareness, improving our mental state. The current scientific understanding of retrieval suppression, however, is based mostly on simpler memories, such as associations between words or pictures, which may not reflect how people control unpleasant memory intrusions in everyday life. Here, we investigated the neural and behavioural dynamics of suppressing personal and emotional autobiographical memories using a modified version of the Think/No-Think task. We asked participants to suppress memories of their own past immoral actions, which were hypothesised to be both highly intrusive and motivating to suppress. We report novel evidence from behavioural, ERP, and EEG oscillation measures that autobiographical memory retrieval can be suppressed and suggest that autobiographical suppression recruits similar neurocognitive mechanisms as suppression of simple laboratory associations. Suppression did fail sometimes, and EEG oscillations indicated that such memory intrusions occurred from lapses in sustained control. Importantly, however, participants improved at limiting intrusions with repeated practice. Furthermore, both behavioural and EEG evidence indicated that intentional suppression may be more difficult for memories of our morally wrong actions than memories of our morally right actions. The findings elucidate the neurocognitive correlates of autobiographical retrieval suppression and have implications for theories of morally motivated memory control.

Description

Keywords

Autobiographical memory, EEG, Memory intrusions, Moral memories, Retrieval suppression, Humans, Memory, Episodic, Mental Recall, Emotions, Cognition, Electroencephalography

Journal Title

Cogn Affect Behav Neurosci

Conference Name

Journal ISSN

1530-7026
1531-135X

Volume Title

Publisher

Springer Science and Business Media LLC
Sponsorship
Medical Research Council (MC_UU_00005/1)