Hello,

I am interested in modeling brain activations immediately preceding a button press the subject makes under COndition A versus under condition B, where the timing of presses is at the discretion of the subject.

I know that waver can make an idealized waveform for regression by referring to a source file with a single column of zeroes, 1 and -1 for TRs corresponding to contrasting events, and that the -tstim option in waver can refer to a text file containing a single column of cumulative event times to generate the irregular idealized waveform.

My question is, how do I combine the two techniques, to create a single idealized regressor source file for 3dDeconvolve which models specific irregular event times of condition A as positive deviations but specific irregular event times of condition B as negative?

Jim B