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Abstract #2844

Monte Carlo simulations of weighted overlap map thresholds to reduce the risk for type I errors in fMRI

Peter Van Schuerbeek1
1Radiology, UZ Brussel (VUB), Brussels, Belgium


We performed Monte Carlo Simulations to show that the risk for type I errors decreases if a minimum overlap between the individual results is set in addition to the significance of the group results. The activation maps of a real fMRI experiment showed that the combination of a weighted overlap map threshold in combination with a voxel significance threshold seems to lead to less type II errors compared to applying a family wise error (FWE) correction.

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