[color=#000000]Hi Natasha,[/color]
[color=#000000]Scrubbing is performed by regressing-out the effect of the outlier scans during denoising (rather than by "eliminating" those invalid scans, since, as you mention, that would create problems down the line by affecting the timing of the data), so once you have the denoised data it is generally not considered necessary to further include any information about invalid scans into your 1st-level analyses. [/color]
[color=#000000]Best[/color]
[color=#000000]Alfonso[/color]
[i]Originally posted by Natasha Mason:[/i][quote]Hi all,
I have an analysis I want to run on task-based fMRI. However am a bit confused. I scrubbed my volumes during pre-processing, and now don't understand what will happen with the timing of my task data. I.e. if a volume is not valid, is it removed from the scan, and thus my task timing is off? If it is not removed, how is it taken into account? I'm not sure how to model this in 1st level.
Thank you,
Natasha[/quote]
[color=#000000]Scrubbing is performed by regressing-out the effect of the outlier scans during denoising (rather than by "eliminating" those invalid scans, since, as you mention, that would create problems down the line by affecting the timing of the data), so once you have the denoised data it is generally not considered necessary to further include any information about invalid scans into your 1st-level analyses. [/color]
[color=#000000]Best[/color]
[color=#000000]Alfonso[/color]
[i]Originally posted by Natasha Mason:[/i][quote]Hi all,
I have an analysis I want to run on task-based fMRI. However am a bit confused. I scrubbed my volumes during pre-processing, and now don't understand what will happen with the timing of my task data. I.e. if a volume is not valid, is it removed from the scan, and thus my task timing is off? If it is not removed, how is it taken into account? I'm not sure how to model this in 1st level.
Thank you,
Natasha[/quote]