I am a little confused as to the function of the censor column. My understanding of the censor column is if it has a one in it, this means the signal for this timepoint will be included in the analysis otherwise it won't if a zero value is there instead. But I am little confused on how this affects the baseline. It has been stated that when the censor has a value of zero then by default 3dDeconvolve will include this timepoint in the baseline? I don't know if I am making sense but I will illustrate an example and I hope someone will clear my confusion.


Say we have 2 conditions..

c1 c2 censor

0 0 0

0 0 0

1 0 0

0 1 1

0 0 1


So what is the difference between each line and how is it interpreted in 3dDeconvolve?

Will the first two rows be included in the baseline or will the first three and the last one be in the baseline instead?

How is baseline based on the above examples specified if my baseline is a rest?

Only when I clear these issues will I understand why I am losing frontal activation when I try to run my analysis in a different way.


Sorry if this is a redundant question but it is also one that is the source of alot of confusion.


Thank you

butterfly.