[Freesurfer] Optseq2 timing outputs
Hi all, I sent a message previously and just wanted to check in one more time about this question (apologies for the repeat message!). I’m using Optseq2 to generate stimulus / jitter schedules and, depending on the TR I use, in the output files I see onset times like 124.4001 (instead of 124.4) or 124.7999 (instead of 124.8). This is the command I’m using: optseq2 --ntp 75 --tr 3.2 --psdwin 0 22.4 3.2 --ev wordPair 3.2 45 --nkeep 6 --o CRtiming.2017 --nsearch 10 --tnullmin 0 --tnullmax 6.4 Should I be concerned about the outputs (does it mean that I’ve specified something incorrectly in the above command), or is it correct to assume that something like 124.4001 just means 124.4? Anyway, thank you so much for your help on this! Best wishes, Ruth Shaffer ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
[Freesurfer] Optseq2 onset times
Hi, I’m using Optseq2 to generate stimulus / jitter schedules, and, depending on the TR used, in the output timing files I see several event onset times very close to the correct time, but slightly off (for example, something like 124.7999, instead of 124.8). I’ve used the following command to generate timing files: optseq2 --ntp 75 --tr 3.2 --psdwin 0 22.4 3.2 --ev wordPair 3.2 45 --nkeep 6 --o CRtiming.2017 --nsearch 10 --tnullmin 0 --tnullmax 6.4 Should I be concerned about optimal onset times that are slightly off from the actual possible onset times based on the TR, or is it correct to assume it should be 124.4, instead of 124.4001 or 125.8, instead of 125.7999, for example? Thank you in advance for any help on this! Best wishes, Ruth Shaffer ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
[Freesurfer] Optseq2 - Repeating Stimuli and Contrasting the Repetitions
Hi all, I’m posting to ask for advice on setting up certain parameters in optseq2: Specifically, in optseq2, how can one set up parameters to best optimize a task where there are say 20 items presented 3 times, where the relevant contrasts are between the first, second, and third presentations of the same items? Meaning the second presentation must come sometime after the first and the third presentation must come sometime after the second? Thank you so much for any help on this! Best wishes, Ruth ___ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
