Processing lexical ambiguities in word triplets: Evidence of lexical-semantic deficits following dominant nonthalamic subcortical lesions

David A. Copland, HJ Chenery, Bruce E. Murdoch

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Lexical-semantic function was investigated in 10 participants with lesions of the dominant nonthalamic subcortical (NS) region and a matched normal control group. Participants performed speeded lexical decisions on the 3rd member of auditorily presented word triplets. The 4 critical triplet conditions were concordant (coin-bank-money), discordant (riverbank-money), neutral (day-bank-money), and unrelated (river-day-money). When the interstimulus interval (ISI) between the words in the triplets was 100 ms, patients with NS lesions obtained priming that indicated nonselective lexical access; at 1,250-ms ISI, however, there was no significant priming effect. This pattern of results is consistent with the view that patients with NS lesions can automatically access lexical-semantic information but may be unable to sustain lexical activation through controlled or attentional forms of processing.

Original languageEnglish
Pages (from-to)379-390
Number of pages12
Issue number3
Publication statusPublished - Jul 2000
Externally publishedYes
Event27th Annual Meeting of the International Neuropsychological Society - BOSTON, United States
Duration: 1 Feb 1999 → …

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