Hello all,
I have a question regarding conditions setup for a project with patient and control groups. The patient group has 2 resting state scans (pre and post) while the control group only has one resting state scan.
I have already created "pre" and "post" conditions in the Setup.Conditions tab. I have affiliated "Session 1" in all subjects with the "pre" condition, and have affiliated "Session 2" in the patient group with the "post" condition (as in this post: https://www.nitrc.org/forum/message.php?msg_id=12762).
My dilemma is how to compare the post scan in patients with the single control scan once I reach 2nd level analyses. Previous posts have recommended entering the pre and post scans in patients as if they were individual scans (https://www.nitrc.org/forum/message.php?msg_id=10754). I'm wondering whether it would also be feasible to simply create a new condition in which:[list=1][*] Session 1/pre scans for the patients are not present (i.e., leave onset/duration fields empty) while[*]Session 2/post scans for the patients are present (i.e. onset of 0 and duration inf) and[*]Session 1 scans for the controls are present.[/list]If I understand correctly, this will create one condition that I can use in 2nd level analyses that compares the post scan in patients to the single control scan. Is this feasible/appropriate?
Thanks in advance for any help!
Tessa
I have a question regarding conditions setup for a project with patient and control groups. The patient group has 2 resting state scans (pre and post) while the control group only has one resting state scan.
I have already created "pre" and "post" conditions in the Setup.Conditions tab. I have affiliated "Session 1" in all subjects with the "pre" condition, and have affiliated "Session 2" in the patient group with the "post" condition (as in this post: https://www.nitrc.org/forum/message.php?msg_id=12762).
My dilemma is how to compare the post scan in patients with the single control scan once I reach 2nd level analyses. Previous posts have recommended entering the pre and post scans in patients as if they were individual scans (https://www.nitrc.org/forum/message.php?msg_id=10754). I'm wondering whether it would also be feasible to simply create a new condition in which:[list=1][*] Session 1/pre scans for the patients are not present (i.e., leave onset/duration fields empty) while[*]Session 2/post scans for the patients are present (i.e. onset of 0 and duration inf) and[*]Session 1 scans for the controls are present.[/list]If I understand correctly, this will create one condition that I can use in 2nd level analyses that compares the post scan in patients to the single control scan. Is this feasible/appropriate?
Thanks in advance for any help!
Tessa