I would appreciate input on choosing a design type for a PET study in
SPM2. Here is the scan sequence for the lone subject:
On Medication
scan 1: task 1 with covariate value 0
scan 2: task 2 with covariate value 0
scan 3: task 3 with covariate value 0
scan 4: task 2 with covariate value 1
scan 5: task 3 with covariate value 1
scan 6: task 1 with covariate value 1
scan 7: task 2 with covariate value 2
scan 8: task 1 with covariate value 2
scan 9: task 3 with covariate value 2
scan 10: task 2 with covariate value 3
scan 11: task 3 with covariate value 3
scan 12: task 1 with covariate value 3
scan 13: task 1 with covariate value 4
scan 14: task 2 with covariate value 4
scan 15: task 3 with covariate value 4
Off Medication
scan 16: task 1 with covariate value 0
scan 17: task 2 with covariate value 0
scan 18: task 3 with covariate value 0
scan 19: task 3 with covariate value 1
scan 20: task 1 with covariate value 1
scan 21: task 2 with covariate value 1
scan 22: task 3 with covariate value 2
scan 23: task 2 with covariate value 2
scan 24: task 1 with covariate value 2
scan 25: task 1 with covariate value 3
scan 26: task 3 with covariate value 3
scan 27: task 2 with covariate value 3
scan 28: task 1 with covariate value 4
scan 29: task 3 with covariate value 4
scan 30: task 2 with covariate value 4
I am considering choosing a "Single-subject: tasks &
covariates" design with 6 conditions:
Condition 1 = On Medication and task 1
Condition 2 = On Medication and task 2
Condition 3 = On Medication and task 3
Condition 4 = Off Medication and task 1
Condition 5 = Off Medication and task 2
Condition 6 = Off Medication and task 3
Are there other design choices that would be better suited?
Thank You,
Trent Bradberry
National Institute on Deafness and Other Communication Disorders
National Institutes of Health
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