| Autor: |
Hanson SJ; Department of Psychology, Rutgers University (Newark), Newark, NJ, USA., Bly BM |
| Jazyk: |
angličtina |
| Zdroj: |
Neuroreport [Neuroreport] 2001 Jul 03; Vol. 12 (9), pp. 1971-7. |
| DOI: |
10.1097/00001756-200107030-00039 |
| Abstrakt: |
A key assumption underlying fMRI analysis in the general linear model is that the underlying distribution of BOLD Susceptibility is gaussian. Analysis of several common data sets and experimental paradigms shows that the underlying distribution for the BOLD signal is non-Gaussian. Further identification shows that the distribution is probably Gamma and implications for hemodynamic modeling are discussed as well as recommendations concerning inferential testing in heavy-tailed environments. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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