afni.nimh.nih.gov

Dear Ward and others,

Example 1.4.4.5 Comparison of two different impulse response magnitudes.
C = [ 0 0 1 1 1 0 0 0 ¨C1 ¨C1 ¨C1]

Output: LC[0] ¡­¡­ t-st = 1.5420¡­.F[1,7] = 2.3779

Q1: How is the df F[1,7] calculated? And what is the df of t-st?

Q2: Does df depend on only p (in this example, p = 3) and N¡¯ (the length of time series)? Does df have any relation to number of trials of each stimulus?

Thanks.

Yufeng