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Within‐test comparisons of receiver‐operating‐characteristics (ROCs) as a function of noise estimate for actual fMRI noise data with synthetic activation A: Test 1 (no assumed form). B: Test 2 (assumed three peak values). C: Test 3 (assumed shape). For Tests 1 and 3, the local noise estimate performs best, followed by the global estimate. Test 2 performance is least sensitive to the noise estimate.
