Hi Gang,
Yes, I'm analyzing the data at the individual subject level and I'm looking at the trial-by-trial data. I used to use raw BOLD signals in my data analysis. But since I used changing ITIs in my design, I would like to see if using beta weights will lead to better results. That's why I wanted to try the 'TENT' function.
Actually I'm just wondering if it is still possible to model 25s while the trial length varied between 22s to 28s? I tried 22s and it worked, but the regress process was too slow and there was collinearity in the regression matrix. So I don't think it's a good solution to the problem.
Thanks!
