Dear Douglas,

Thanks for your explanation. These information are helpful to me.

>I'm not sure what you mean. How can it be a delay if it is after the trial is over?

I’m sorry for I didn’t describe my second question well. I think I can take another situation to describe my question.

If I have a experiment that present stimulus until participants response, and I know the average RT of this experiment is 1500 ms after pilot test.

In this situation, should I +/- the duration of jitter/null condition in terms of the duration of each stimulus?

For example, if a part of sequence Optseq2 output is “ Con1 Null(500 ms) Con2 Null(1500 ms)”, and one of participants takes 1000 ms to response for Con1.

Should I add 500 ms to the first Null? or I don’t need to anything?

Thanks for your reading.

Best Regards,

Chih-Hao