Dear Douglas,

I'm sorry that I didn't include previous correspondence in my email, from now on, I'll remember to include it.

(I'm a new user of the FreeSurfer Mail Archive, I hope I include previous correspondence at this time.)

Thanks for your reminding.

Best Regards, Chih-Hao

________________________________ Date: Fri, 5 Aug 2016 11:45:55 -0400 From: Douglas N Greve greve@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] How does Optseq2 arrange order of conditions? To: freesurfer@nmr.mgh.harvard.edu Message-ID: 57A4B4B3.1000601@nmr.mgh.harvard.edu Content-Type: text/plain; charset=UTF-8; format=flowed

Please remember to include previous correspondence in your email.

On 08/01/2016 04:22 AM, ? ?? wrote:

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

thetrial 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

---

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