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Titolo:
Parameters of semantic and phonologic activation in speakers with aphasia with and without apraxia of speech
Autore:
Rogers, MA; Redmond, JJ; Alarcon, NB;
Indirizzi:
Univ Washington, Dept Speech & Hearing Sci, Seattle, WA 98105 USA Univ Washington Seattle WA USA 98105 & Hearing Sci, Seattle, WA 98105 USA
Titolo Testata:
APHASIOLOGY
fascicolo: 9-11, volume: 13, anno: 1999,
pagine: 871 - 886
SICI:
0268-7038(199909/11)13:9-11<871:POSAPA>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
SENTENCE PRODUCTION; LANGUAGE PRODUCTION; LEXICAL RETRIEVAL; TIME COURSE; COMPREHENSION; ONLINE; DISORDERS; ACCESS; ADULTS; WORDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
37
Recensione:
Indirizzi per estratti:
Indirizzo: Rogers, MA Univ Washington, Dept Speech & Hearing Sci, 1417 NE 42nd St, Seattle, WA 98105 USA Univ Washington 1417 NE 42nd St Seattle WA USA 98105 98105 USA
Citazione:
M.A. Rogers et al., "Parameters of semantic and phonologic activation in speakers with aphasia with and without apraxia of speech", APHASIOLOGY, 13(9-11), 1999, pp. 871-886

Abstract

A cross-modal picture-word interference paradigm was employed to investigate parameters of semantic and phonologic activation in four speakers with aphasia (APH), four speakers with aphasia and a concomitant apraxia of speech (APH/AOS) and ten speakers with normal speech and language (NC). Participants named pictured objects in the context of listening to words that were either semantically or phonologically related to the picture labels. Relative to the presentation of the target picture, these semantic and phonologicinterfering stimuli (IS) were presented at seven different temporal asynchronies, labelled stimulus onset asynchronies (SOA). Speech onset latencies were analysed and SOAs at which the semantic and phonologic IS began and ceased to slow naming latencies were obtained. The time course of semantic and phonologic processing was inferred using the following four activation parameters: (1) interference onset SOA; (2) interference offset SOA; (3) peakinterference SOA; and (4) activation period. The results indicated that onset of phonologic activation occurred later for APH/AOS than for APH participants. Additionally, the offset of semantic interference was significantlydelayed in the APH/AOS group relative to the APH group. It is hypothesizedthat phonologic activation accrues more slowly in aphasic individuals who have a concomitant apraxia of speech and that prolonged semantic activationmay be necessary to achieve sufficient levels of phonologic activation fornaming.

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Documento generato il 30/03/20 alle ore 19:41:46