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Titolo:
A reference effect approach for power analysis in fMRI
Autore:
Zarahn, E; Slifstein, M;
Indirizzi:
Columbia Univ Coll Phys & Surg, Dept Psychiat, Div Funct Brain Mapping, New York, NY 10032 USA Columbia Univ Coll Phys & Surg New York NY USA 10032 w York, NY 10032 USA
Titolo Testata:
NEUROIMAGE
fascicolo: 3, volume: 14, anno: 2001,
pagine: 768 - 779
SICI:
1053-8119(200109)14:3<768:AREAFP>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
EVENT-RELATED FMRI; FUNCTIONAL MRI; BRAIN ACTIVITY; LATERALIZATION; VARIABILITY; RESPONSES; INFERENCE; CONTRAST; EPILEPSY; DESIGNS;
Keywords:
fMRI; power;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Zarahn, E Columbia Univ Coll Phys & Surg, Dept Psychiat, Div Funct Brain Mapping, 722 W 168th St, New York, NY 10032 USA Columbia Univ Coll Phys & Surg 722 W 168th St New York NY USA 10032
Citazione:
E. Zarahn e M. Slifstein, "A reference effect approach for power analysis in fMRI", NEUROIMAGE, 14(3), 2001, pp. 768-779

Abstract

In fMRI, the issues involved in the control of type I error are fairly well understood. In contrast, the control of type II error has received less formal attention. This is perhaps due to the fact that the consideration of type II error requires the specification of an alternative hypothesis/experimental effect. In this paper, we present a method for expressing experimental effects in fMRI in a manner relative to a reference effect. A referenceeffect is chosen based on its neurophysiological significance to the researcher. This method provides a means to quantitatively express alternative hypotheses for fMRI, thus allowing type II error assessment prior to the collection of fMRI data. The simultaneous control of both type I and type II error should make meaningful interpretations possible from both positive andnegative fMRI results. (C) 2001 Academic Press.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/01/20 alle ore 18:57:24