Hi Danielle, there is not a way to do this directly. You can use the --focb argument (first-order counterbalancing) to optimize the likelihood that you get an equal number of cong following incong, etc. Maybe use --focb 1000 doug

On 11/28/2012 09:49 AM, Danielle Miller wrote:

Hi Freesurfer,

I have a paradigm in which the conditions are dependent on each other. That is, trials (e.g., congruent or incongruent) are linked to each other in that I want an equal number of trials to follow each other (e.g., congruent- congruent, congruent- incongruent, incongruent-congruent, incongruent-incongruent). When trying optseq2, it of courses randomizes the presentation, and I do not get equal presentations of the "pairs" of trials. Is there a way to jitter dependent trials using optseq? If not, do you have any suggestions on how to address this issue?

Thanks,

Danielle

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