Poster B72, Sunday, March 25, 8:00-10:00 am, Exhibit Hall C
Neural interactions between memory and language: The role of language profile on semantic processing leading to true and false memories
Eugenia Marin-Garcia1, Pedro M. Paz-Alonso2; 1University of the Basque Country, 2BCBL
Consequences of linguistic profile of the speaker in how semantic information is encoded and recovered from memory remain not well understood. We used the Deese/Roediger-McDermott (DRM) paradigm to investigate semantic relational processing leading to veridical and false memories in monolinguals and bilinguals. Spanish monolinguals and Spanish/Basque bilinguals were compared while performing DRM paradigm in a MRI. Their linguistic profile was defined by language age of acquisition, language proficiency and language use/exposure in their every day life. Participants were instructed to study word lists for a memory test. Materials consisted in Spanish DRM word lists that converge on a semantic theme captured in a critical word (critical lure) never presented in the list. After encoding, participants performed an old/new recognition test that included studied words, critical lures, and unrelated lures. Associative strength, the tendency of DRM lists to elicit false memories, was manipulated including lists with high and low associative strength. Behavioral results showed that monolinguals exhibited significantly more true memories relative to bilinguals, in both, high and low associative strength conditions. fMRI results revealed that left Inferior Frontal Gyrus (IFG), specifically pars triangularis, was significantly more activated in bilinguals than monolinguals for both, true and false memories. And this area was more activated for low than high associative strength conditions. These results are consistent with previous evidence showing that the IFG is engaged in semantic tasks requiring active strategies and effortful processing. And this suggests a less automatized or more effortful semantic access in bilinguals than in monolinguals.
Topic Area: LONG-TERM MEMORY: Semantic