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  • Title: Selection demands versus association strength in the verb generation task.
    Author: Martin RC, Cheng Y.
    Journal: Psychon Bull Rev; 2006 Jun; 13(3):396-401. PubMed ID: 17048721.
    Abstract:
    Neuroimaging and neuropsychological data from Thompson-Schill and colleagues (Thompson-Schill, D'Esposito, Aguirre, and Farah, 1997; Thompson-Schill et al., 1998) showed that in the verb generation task, the left inferior frontal gyrus (left IFG) was more involved in a high-selection condition, in which the noun had two verb responses of equal association strength, than in a low-selection condition, in which the noun had only one strongly associated verb. They proposed that the left IFG was involved in selecting semantic information from competing alternatives. The present study compared verb generation in two high-selection conditions that varied in the association strength of the most frequently produced verbs. The results from neurally intact participants and a patient with a lesion that included the left IFG indicated that association strength between nouns and the most frequently produced verb, rather than competition during verb selection, affected verb generation. The degree of involvement of the left IFG may depend on the difficulty of verb retrieval as reflected in association strength.
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