You can specify that there are 4 trial types (AA, AB, BA, BB), and give the duration twice that of the individual.
doug Gaber, Tilman wrote: > Dear mailinglist recipients, > > I am currently planning an optimized experiment using optseq2 and a 2x2 > factors behavioral response task (Simon-task). > The task consists of a pseudo-randomized series of two kinds of trials > (congruent and incongruent). > In addition there is a sequential factor, i.e. it is of interest whether a > trial follows a trial of the same or the opposite kind. In other words there > are (2x2) four different conditions where trials relate to precedent trials > (AA,AB,BB,BA). > Would it be possible to incorporate this sequential factor into the optseq2? > I am aware that null events will fall between trials and thus interrupt trial > sequences. Trials following null events would therefore be treated > separately (i.e. for data analysis). In order to obtain an equal number of > trials per condition, this would require increasing the number of trials > depending on the number and order of null events. > Currently I am able to produce a randomized order of equally balanced trials > regarding trial type and sequential order (AA,AB,BB,BA). > Any thoughts or suggestions are more than welcome! > > Best, > Tilman > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer > > > -- Douglas N. Greve, Ph.D. MGH-NMR Center gr...@nmr.mgh.harvard.edu Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: www.nmr.mgh.harvard.edu/facility/filedrop/index.html _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
