A Case-Series Test of the Interactive Two-Step Model of Lexical Access: Evidence from Picture Naming

Autor/inn/en	Schwartz, Myrna F.; Dell, Gary S.; Martin, Nadine; Gahl, Susanne; Sobel, Paula
Titel	A Case-Series Test of the Interactive Two-Step Model of Lexical Access: Evidence from Picture Naming
Quelle	In: Journal of Memory and Language, 54 (2006) 2, S.228-264 (37 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0749-596X
DOI	10.1016/j.jml.2005.10.001
Schlagwörter	Semantics; Phonology; Aphasia; Case Studies; Lexicology; Models + Suchen Sie Ihr Suchwort? Semantik; Fonologie; Expressive Aphasie; Aphasie; Case study; Fallstudie; Case Study; Lexikologie; Analogiemodell
Abstract	Many facts about aphasic and nonaphasic naming are explained by models that use spreading activation to map from the semantics of a word to its phonology. The implemented model of picture naming discussed here achieves this by coupling interactive feedback with two selection steps. The model's structure and default parameters were set up to match the normal naming profile; and aphasic naming is simulated by altering ''lesionable'' parameters away from default settings. Past studies within this framework have used different sets of lesionable parameters. Here, in the largest and most representative case-series ever modeled, we show the superiority of the version of the model that allows lesions to weaken semantic and/or phonological connections. Pairing this approach to lesions with the assumptions of interactivity and two-step selection equips the model to explain the wide variation in individual naming response profiles and key facts about lexical and sublexical errors. (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10