ERIC Number: EJ721892
Record Type: Journal
Publication Date: 2005-Dec
Reference Count: 64
Does Normal Processing Provide Evidence of Specialised Semantic Subsystems?
Shapiro, Laura R.; Olson, Andrew C.
Language and Cognitive Processes, v20 n6 p697-724 Dec 2005
Category-specific disorders are frequently explained by suggesting that living and non-living things are processed in separate subsystems (e.g. Caramazza & Shelton, 1998). If subsystems exist, there should be benefits for normal processing, beyond the influence of structural similarity. However, no previous study has separated the relative influences of similarity and semantic category. We created novel examples of living and non-living things so category and similarity could be manipulated independently. Pre-tests ensured that our images evoked appropriate semantic information and were matched for familiarity. Participants were trained to associate names with the images and then performed a name-verification task under two levels of time pressure. We found no significant advantage for living things alongside strong effects of similarity. Our results suggest that similarity rather than category is the key determinant of speed and accuracy in normal semantic processing. We discuss the implications of this finding for neuropsychological studies. (Contains 3 tables and 5 figures.)
Descriptors: Familiarity, Semantics, Neuropsychology, Cognitive Processes, College Students, Neurological Impairments, Language Research
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Publication Type: Journal Articles; Reports - Evaluative
Education Level: Higher Education
Authoring Institution: N/A