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Titolo:
Is there a relationship between speech and nonspeech auditory processing in children with dyslexia?
Autore:
Rosen, S; Manganari, E;
Indirizzi:
Univ Coll London, Dept Phonet & Linguist, London NW1 2HE, England Univ Coll London London England NW1 2HE inguist, London NW1 2HE, England
Titolo Testata:
JOURNAL OF SPEECH LANGUAGE AND HEARING RESEARCH
fascicolo: 4, volume: 44, anno: 2001,
pagine: 720 - 736
SICI:
1092-4388(200108)44:4<720:ITARBS>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
LANGUAGE-IMPAIRED CHILDREN; PERCEPTION DEFICITS; DEVELOPMENTAL DYSLEXIA; POOR READERS; DISCRIMINATION; SENSITIVITY; BACKWARD; MASKING; APHASIA;
Keywords:
dyslexia; auditory processing; backward masking; forward masking;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
36
Recensione:
Indirizzi per estratti:
Indirizzo: Rosen, S Univ Coll London, Dept Phonet & Linguist, 4 Stephenson Way, London NW1 2HE, England Univ Coll London 4 Stephenson Way London England NW1 2HE England
Citazione:
S. Rosen e E. Manganari, "Is there a relationship between speech and nonspeech auditory processing in children with dyslexia?", J SPEECH L, 44(4), 2001, pp. 720-736

Abstract

A group of 8 young teenagers with dyslexia were compared to age-matched control participants on a number of speech and nonspeech auditory tasks. There were no differences between the control participants and the teenagers with dyslexia in forward and simultaneous masking, nor were there any differences in frequency selectivity as indexed by performance with a bandstop noise. Thresholds for backward masking in a broadband noise were elevated for the teenagers with dyslexia as a group. If this deficit in backward maskinghad an influence on speech perception, we might expect the perception of "ba" versus "da" to be affected, as the crucial second formant transition isfollowed by a vowel. On the other hand, as forward masking is not different in the two groups, we would expect the perception of "ab" versus "ad" to be unaffected, as the contrastive second. formant transition is preceded bya vowel. Overall speech identification and discrimination performance for these two contrasts was superior for the control group but did not differ otherwise. Thus, the clear group deficit in backward masking in the group with dyslexia has no simple relationship to the perception of crucial acoustic features in speech. Furthermore, the deficit for nonspeech analogues of the speech contrasts (second formants in isolation) was much; less marked than for the speech sounds, with 75% of the listeners with dyslexia performing equivalently to control listeners. The auditory deficit cannot therefore,be simply characterized as a difficulty in processing rapid auditory information. Either there is a linguistic/phonological component to the speech perception deficit, or there is an important effect of acoustic complexity.

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Documento generato il 31/03/20 alle ore 03:53:33