Hello Katerina,
- The first row in the SyncSlide.OnsetTime column reflects the onset of the first TR in E-Prime clock (i.e., the first trigger). This time must be subtracted from all other timestamps in the TAB.txt to determine the amount of time since the first trigger / first BOLD volume. - To determine the onset of the task blocks, use Cue2Back.OnsetTime for 2-back blocks or CueTarget.OnsetTime for 0-back blocks. The individual task stimuli are presented after the task cue. - Additional information about the timing values in the TAB.txt files is provided in Appendix 6 to the HCP Reference Manual: https://www.humanconnectome.org/storage/app/media/documentation/s1200/HCP_S1200_Release_Appendix_VI.pdf --Greg ____________________________________________________________________ Greg Burgess, Ph.D. Staff Scientist, Human Connectome Project Washington University School of Medicine Department of Psychiatry Phone: 314-362-7864<tel:314-362-7864> Email: [email protected]<mailto:[email protected]> On Jun 9, 2018, at 9:18 AM, Katharina Ring <[email protected]<mailto:[email protected]>> wrote: Hi everyone, I am working on the working memory task fMRI data and want to extract the exact times for when the first picture of each block is shown. I found the WM_run2_TAB.txt file and in it the column “Stim.OnsetTime”. However, the first stimulus is at 36 seconds according to this file, which contradicts the info in the Evs folder. I am guessing the Stim.OnsetTime includes some time before the task starts? Is there a way to find out how much time exactly that is, so I can get the exact time where the picture starts to be shown? Also, I couldn’t find an end time for the pictures. Is there an exact end time reported somewhere or do I have to use the approximate 2 seconds for the stimulus duration? There is the “Stim.OnsetToOnsetTime” Column, but I thought after every picture shown, there is a 0.5 seconds pause? Thanks in advance, Katharina PS: I'm sending this again as I haven't gotten any answers last time. Still hope, someone can help! _______________________________________________ HCP-Users mailing list [email protected]<mailto:[email protected]> http://lists.humanconnectome.org/mailman/listinfo/hcp-users ________________________________ The materials in this message are private and may contain Protected Healthcare Information or other information of a sensitive nature. If you are not the intended recipient, be advised that any unauthorized use, disclosure, copying or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this email in error, please immediately notify the sender via telephone or return mail. _______________________________________________ HCP-Users mailing list [email protected] http://lists.humanconnectome.org/mailman/listinfo/hcp-users
