Dear SPM experts,
I am trying to take a patient who has done the same test twice and run a flexible factorial design to see if there are any differences between scans. My end goal is to use the con.img's that would be outputted as another comparison with a group of controls that have also done the test twice. I have gotten the "no significant voxels." message each time I try comparing the single patient's scan 2 to scan 1.
I have used a two-sample t-test, ANOVA-within a subject, and flexible factorial design, and each of them is still giving me the same error. After reading the posts about changing the independence and variance such that non-sphericitiy is assumed, yet I still receive the same message. I have checked the images with checkreg and they are the same dimensions and everything. I have also tried changing the defaults.stats.fmri.ufp to a more liberal threshold (from 0.001 to 0.01 and even to 0.1) but also still receive the same error message.
This is the first time I have tried comparing a single subject's first and second scans, so perhaps I am doing something wrong to begin with? From what I have read, repeated measures analysis is appropriate, and I believe I set it up appropriately as well.
Any advice/help would be greatly appreciated.
Thank you,
Devin
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