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Titolo:
Linear and nonlinear analysis of the stability of gestural organization inspeech movement sequences
Autore:
Ward, D; Arnfield, S;
Indirizzi:
Univ Reading, Sch Linguist & Appl Language Studies, Reading RG6 6AA, Berks, England Univ Reading Reading Berks England RG6 6AA eading RG6 6AA, Berks, England Apple House Ctr Stammering, Oxford, England Apple House Ctr Stammering Oxford England r Stammering, Oxford, England
Titolo Testata:
JOURNAL OF SPEECH LANGUAGE AND HEARING RESEARCH
fascicolo: 1, volume: 44, anno: 2001,
pagine: 108 - 117
SICI:
1092-4388(200102)44:1<108:LANAOT>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPEAKING RATE; UPPER LIP; KINEMATIC ANALYSIS; JAW; STUTTERERS;
Keywords:
motor speech control; normalization techniques; gestural organization; articulation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Citazioni:
33
Recensione:
Indirizzi per estratti:
Indirizzo: Ward, D Univ Reading, Sch Linguist & Appl Language Studies, Reading RG6 6AA, Berks, England Univ Reading Reading Berks England RG6 6AA G6 6AA, Berks, England
Citazione:
D. Ward e S. Arnfield, "Linear and nonlinear analysis of the stability of gestural organization inspeech movement sequences", J SPEECH L, 44(1), 2001, pp. 108-117

Abstract

Recent procedures have been developed that allow the analysis of gestural stability across repetitions of phrase-length utterances by linearly normalizing aspects of the articulatory signal. This process produces an index ofvariability called spatiotemporal index, or STI (Smith, Goffman, Zelaznik,Ying, & McGillem, 1995). Consistent Findings that different Sns underlie changes in speaking rates in normally speaking adults have been Found in subsequent studies by Smith and colleagues. However some researchers have raised concerns that linearly normalized data do not adequately account for thenonlinear aspects in the articulatory signal (Lucero, Munhall, Gracco, & Ramsey, 1997). The present study compared findings from linear and nonlinearnormalization procedures in the analysis of lower-lip displacement of phrase-length utterances for a group of 8 speakers and across three rates. Findings indicated that at a group level, gestural stability although higher for each rate contingency, was similar to that found in earlier STI studies. However, variability was greater, and 4 of the 8 subjects Failed to consistently demonstrate greater stability at habitual rate, followed by fast and then slow rate. A nonlinearly normalized analysis of the some data producedsignificantly lower stability indices, and variability was also reduced. It is argued that a nonlinear normalization procedure based on lower-lip displacement holds advantages in the analysis of phrase-length speech data over both linear and alternative nonlinear normalization techniques.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 04:57:12