Probabilistic orthographic cues to grammatical category in the brain
Arciuli, J., McMahon, K., & de Zubicaray, Greig (2012) Probabilistic orthographic cues to grammatical category in the brain. Brain and Language, 123(3), pp. 202-210.
What helps us determine whether a word is a noun or a verb, without conscious awareness? We report on cues in the way individual English words are spelled, and, for the first time, identify their neural correlates via functional magnetic resonance imaging (fMRI). We used a lexical decision task with trisyllabic nouns and verbs containing orthographic cues that are either consistent or inconsistent with the spelling patterns of words from that grammatical category. Significant linear increases in response times and error rates were observed as orthography became less consistent, paralleled by significant linear decreases in blood oxygen level dependent (BOLD) signal in the left supramarginal gyrus of the left inferior parietal lobule, a brain region implicated in visual word recognition. A similar pattern was observed in the left superior parietal lobule. These findings align with an emergentist view of grammatical category processing which results from sensitivity to multiple probabilistic cues.
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|Item Type:||Journal Article|
|Keywords:||FMRI, Grammatical category, Nouns, Orthography, Probabilistic cues, Verbs|
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
|Copyright Owner:||Copyright 2012 Crown|
|Deposited On:||07 Sep 2015 06:57|
|Last Modified:||07 Sep 2015 06:57|
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