help
help > RE: band pass filter
Jan 21, 2016 04:01 AM | Alfonso Nieto-Castanon - Boston University
RE: band pass filter
Hi Mary,
If I recall correctly the rationale for the default filtering values in CONN was a bit of a compromise, the high-pass value (0.008Hz) is meant to approximate both a round 2-minutes value (0.0083Hz) as well as SPM's default value (0.0078Hz), while the low-pass value (0.09Hz) is meant to approximate both the 0.08Hz and 0.10Hz values that are commonly found in the literature as well as to match SPM's hemodynamic response function cutoff frequency (.091Hz). I do not have any particular reference for these choices but I imagine you could perhaps simply cite other papers that have used CONN as I imagine many people will have simply used the default values there as well.
Hope this helps
Alfonso
Originally posted by Mary Newsome:
If I recall correctly the rationale for the default filtering values in CONN was a bit of a compromise, the high-pass value (0.008Hz) is meant to approximate both a round 2-minutes value (0.0083Hz) as well as SPM's default value (0.0078Hz), while the low-pass value (0.09Hz) is meant to approximate both the 0.08Hz and 0.10Hz values that are commonly found in the literature as well as to match SPM's hemodynamic response function cutoff frequency (.091Hz). I do not have any particular reference for these choices but I imagine you could perhaps simply cite other papers that have used CONN as I imagine many people will have simply used the default values there as well.
Hope this helps
Alfonso
Originally posted by Mary Newsome:
Hi Alfonso,
A reviewer had asked for a citation for the default band pass filter range in version 14p (0.008 – 0.09 Hz). Would there be any we could tell him/her? I know it's not much different from others, e.g., .009-.08 and .01-.10. Was 0.008 chosen perhaps because 0.0083 had been suggested to be a standard (Ashby, 2011)? I've been looking for a rationale for the upper end, 0.09, and wasn't sure.
Thanks very much,
Mary
A reviewer had asked for a citation for the default band pass filter range in version 14p (0.008 – 0.09 Hz). Would there be any we could tell him/her? I know it's not much different from others, e.g., .009-.08 and .01-.10. Was 0.008 chosen perhaps because 0.0083 had been suggested to be a standard (Ashby, 2011)? I've been looking for a rationale for the upper end, 0.09, and wasn't sure.
Thanks very much,
Mary
Threaded View
| Title | Author | Date |
|---|---|---|
| Mary Newsome | Jan 20, 2016 | |
| Alfonso Nieto-Castanon | Jan 21, 2016 | |
| Jeff Browndyke | Jan 21, 2016 | |
| Alfonso Nieto-Castanon | Jan 21, 2016 | |