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  • Does performance in a nonve...
    Ramos Nunez, Aurora I; Ravid, Maya; Hernandez, Arturo E

    Journal of Cognitive Neuroscience. Supplement, 01/2013
    Journal Article

    Previous studies have found neural similarities between verbal and nonverbal processes. Given these findings, performance in one task may predict neural mechanisms in the other task. The current study investigated how performance in a nonverbal executive control task predicts brain activity in a verbal task using a regression analysis method. Spanish-English adult bilinguals (n=46) performed verbal language switching and nonverbal rule-changing tasks while inside the fMRI scanner. Participants overtly named objects in three conditions: Spanish only, English only and mixed (alternating between Spanish and English) in a picture-naming task. The nonverbal task was a rule-switching paradigm in which participants responded using a button box to color or shape, with the dimension of interest changing after a small number of trials, as indicated by a cue. We performed a regression analysis using the behavioral error rates from the nonverbal task as regressors to predict neural activity in the single language and mixed conditions of the verbal task. Our results show that participants with higher error rates in the nonverbal task showed increased activity in frontoparietal, cingulate, and caudate regions associated with cognitive control processes. Participants with lower error rates presented with increased activity in sensorimotor areas such as precentral and postcentral cortices, rolandic operculum, and occipital cortex in the verbal task. Our results suggest a direct connection between nonverbal control and verbal task performance. These findings are consistent with models suggesting a link between cognitive control and language processing in bilinguals.