Inaccuracy In Subject's Behavioral Response - Impact On Analysis Of Functional Magnetic Resonance Imaging Data

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Authors

MIKL Michal DRASTICH Aleš HLUŠTÍK Petr MAREČEK Radek BRÁZDIL Milan

Year of publication 2008
Type Article in Proceedings
Conference 19-TH BIENAL INTERNATIONAL EURASIP CONFERENCE BIOSIGNAL 2008 BOOK OF ABSTRACTS
MU Faculty or unit

Faculty of Medicine

Citation
Field Neurology, neurosurgery, neurosciences
Keywords fMRI; inaccuracy; behavioral response; analysis
Description The aim of this work is to find how much the fMRI results depend on inaccuracy in subject's behavioral response. We found covariance between specific columns of design and differential (inaccuracy) matrix is a good measure of inaccuracy. Estimated effect size as well as t-statistics for higher level of noise depend linearly on this covariance. The results from theoretical relationships and simulations with synthetic data were verified with real data. Our findings contribute to better understanding of problem of inaccuracy in subject's behavioural response.
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