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Titolo:
IS IT REALLY A MISMATCH NEGATIVITY - AN ASSESSMENT OF METHODS FOR DETERMINING RESPONSE VALIDITY IN INDIVIDUAL SUBJECTS
Autore:
MCGEE T; KRAUS N; NICOL T;
Indirizzi:
NORTHWESTERN UNIV,2299 N CAMPUS DR EVANSTON IL 60208
Titolo Testata:
Electroencephalography and clinical neurophysiology. Evoked potentials
fascicolo: 4, volume: 104, anno: 1997,
pagine: 359 - 368
SICI:
0168-5597(1997)104:4<359:IIRAMN>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED POTENTIALS; ACOUSTIC CHANGE; BRAIN; SLEEP; WAKEFULNESS; ATTENTION; STIMULUS; CHILDREN; LATENCY;
Keywords:
AUDITORY EVOKED POTENTIAL; MISMATCH NEGATIVITY; STATISTICAL METHODS FOR EVOKED POTENTIALS; SIGNAL DETECTION THEORY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
27
Recensione:
Indirizzi per estratti:
Citazione:
T. Mcgee et al., "IS IT REALLY A MISMATCH NEGATIVITY - AN ASSESSMENT OF METHODS FOR DETERMINING RESPONSE VALIDITY IN INDIVIDUAL SUBJECTS", Electroencephalography and clinical neurophysiology. Evoked potentials, 104(4), 1997, pp. 359-368

Abstract

Mismatch negativity (MMN) responses were collected from 86 normal school-age children in response to synthesized speech syllables, /wa/ andtwo variants of /ba/. Waveform characteristics and statistical properties of the responses were analyzed across stimulus conditions in order to assess methods for determining response validity in individuals. Methods were compared using signal detection theory techniques. Criteria based on measurements of response area, onset latency, and durationwere the best indicators of response validity. Also a promising indicator of validity was the interval of significance based on Z transformations determined by considering the variance of the underlying noise distribution. Correlations of individual responses with the grand average and integral calculations of the response negativity showed somewhat lower d' values. Statistical methods which utilized response subaverages were the poorest indicators of response validity. Likely the methods are limited primarily by the signal to noise ratio of the MMN compared to the underlying physiologic noise. improvement of the signal to noise ratio remains a significant factor in the interpretation of MMN for individual subjects. (C) 1997 Elsevier Science Ireland Ltd.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 20/01/20 alle ore 22:15:10