This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Episodic retrieval often involves selection of a target amidst interference from competing memories. To explore the neurobiological mechanisms recruited during retrieval in the face of competition and the mechanisms that contribute to the suppression of selected-against competitors, we used fMRI to study retrieval-induced forgetting (Anderson, Bjork, & Bjork, 1994). Participants (n=13) initially studied cue associate word pairs, learning multiple associates for each cue. Subsequently, participants performed retrieval practice for some of the associates of some of the cues. Finally, a cued recall test was administered for all items. Behavioral data replicated the retrieval-induced forgetting effect: unpracticed associates of a practiced cue (competitors) were less likely to be recalled than unpracticed associates of an unpracticed cue (baseline items) behavioral evidence for suppression of competing memories.
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