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Titolo:
Auditory evoked response data reduction by PCA: Development of variables sensitive to reading disability
Autore:
Duffy, FH; Valencia, I; McAnulty, GB; Waber, DP;
Indirizzi:
Childrens Hosp, Dept Neurol, Labs Clin Neurophysiol & Dev Neurophysiol, Boston, MA 02115 USA Childrens Hosp Boston MA USA 02115 Dev Neurophysiol, Boston, MA 02115 USA Childrens Hosp, Dept Psychiat, Boston, MA 02115 USA Childrens Hosp BostonMA USA 02115 p, Dept Psychiat, Boston, MA 02115 USA
Titolo Testata:
CLINICAL ELECTROENCEPHALOGRAPHY
fascicolo: 3, volume: 32, anno: 2001,
pagine: 168 - 178
SICI:
0009-9155(200107)32:3<168:AERDRB>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
BRAIN ELECTRICAL-ACTIVITY; EVENT-RELATED POTENTIALS; PRINCIPAL COMPONENTS; MAGNOCELLULAR DEFECT; PSYCHIATRIC-PATIENTS; DYSLEXIA; NEUROMETRICS; DESCRIPTORS; PERCEPTION; DIAGNOSIS;
Keywords:
auditory evoked response; principal components analysis (PCA); factor analysis; quantitative EEG; dyslexia; reading; language; phonemic discrimination;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
52
Recensione:
Indirizzi per estratti:
Indirizzo: Duffy, FH Childrens Hosp, Dept Neurol, Labs Clin Neurophysiol & Dev Neurophysiol, 300 Longwood Ave, Boston, MA 02115 USA Childrens Hosp 300 Longwood Ave Boston MA USA 02115 MA 02115 USA
Citazione:
F.H. Duffy et al., "Auditory evoked response data reduction by PCA: Development of variables sensitive to reading disability", CLIN ELECTR, 32(3), 2001, pp. 168-178

Abstract

Long latency auditory evoked responses (AER) were formed on 232 healthy normal and learning impaired subjects to tone pairs of 50 msec inter-stimulusinterval (TALAER) and also to the words "tight" and "tyke" (TTAER). Both evoked potential (EP) types have been used to demonstrate differences between good readers (WIAT Basic Reading score > 115, N=42) and poor readers (Reading score < 85, N=42). A largely automated, hands off approach was used toreduce artifact contamination, to develop canonical measures for discriminating good from poor readers, and to predict reading scores across the entire population including intermediate (average) readers. Eye and muscle artifact were diminished by multiple regression. Substantial EP data reduction was enabled by an unrestricted use of Principal Components Analysis (PCA). For each EP type, 40 factors encompassed 70-80% of initial variance, a meaningful data reduction of about 90:1. Factor interpretation was enhanced by mapping of the factor loadings. By discriminant analysis, resulting factorspredicted reading group membership with over 80% jackknifed and also split-half replication accuracy. By multiple regression, they produced a canonical variate correlating significantly (p <0.001) with the Basic Reading score (r=0.39). The TTAER factors were more useful than the TALAER factors. The relevance of rapid auditory processing and phonemic discrimination measurements to dyslexia is discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 18:37:26