3dREMLfit AFNIÕs New Approach to Dealing with Serial Correlation in FMRI Linear Regression (GLM) |
Conclusions First |
3dDeconvolve and Ordinary Least Squares (OLSQ) |
A Tiny Amount of Mathematics |
Mathematical Model for Serial Correlation |
New Program: 3dREMLfit |
Rapid Event Related Design (NIH
3 T: JJY) Individual Maps from 17 Subjects |
Block Design (15 s blocks:
FBIRN-1 SM Task) 1 Individual Map (Subject#106) |
Block Design (30 s blocks:
NIH 3T; JJY) Individual Maps from 16 Subjects |
Results Thus Far |
Block Design: Group Results (3dANOVA3) |
Event-Related Design: Group Results (3dANOVA3) |
Tentative Conclusions |
Outline of SPM and FSL Approaches |
Using 3dREMLfit - 1 |
Using 3dREMLfit - 2 |
Potential Add-ons to 3dREMLfit |
Serial Correlation Model & Notation: ARMA(1,1) |
AR(1): a vs. MA(1): b vs. ARMA(1,1): a & b |
Spectrum (slightly smoothed absFFT) of Residuals |
Spectrum of Residuals |
Spectrum of Residuals |
6 Types of Analysis |
Conclusions from Previous Slides |
Mathematics and Implementation |