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help > RE: Second level results?
Apr 9, 2015 12:04 PM | Alfonso Nieto-Castanon - Boston University
RE: Second level results?
Hi Kaitlin,
Both methods are perfectly valid. Typically cluster-extent inferences may be more sensitive to detect relatively weak but large clusters of 'activation', while peak-based inferences amay be more sensitive to detect small but strong clusters of 'activation'. These differences are unrelated to whether your design is longitudinal or cross-sectional so, as far as I can tell, there is no good reason to prefer one method over the other a priori in your analysis (you should nevertheless not choose a posteriori based on which method gives you better results; i.e. simply use a consistent criteria across your potentially-multiple analyses unless you have a good a priori reason to use different thresholds or different methods across your multiple analyses).
Hope this helps
Alfonso
Originally posted by Kaitlin Cassady:
Both methods are perfectly valid. Typically cluster-extent inferences may be more sensitive to detect relatively weak but large clusters of 'activation', while peak-based inferences amay be more sensitive to detect small but strong clusters of 'activation'. These differences are unrelated to whether your design is longitudinal or cross-sectional so, as far as I can tell, there is no good reason to prefer one method over the other a priori in your analysis (you should nevertheless not choose a posteriori based on which method gives you better results; i.e. simply use a consistent criteria across your potentially-multiple analyses unless you have a good a priori reason to use different thresholds or different methods across your multiple analyses).
Hope this helps
Alfonso
Originally posted by Kaitlin Cassady:
Hi there!
Just wanted to follow up on this post, since I haven't received a response to my question yet. Any suggestions/insight would be greatly appreciated!
Thank you!
Just wanted to follow up on this post, since I haven't received a response to my question yet. Any suggestions/insight would be greatly appreciated!
Thank you!
Threaded View
| Title | Author | Date |
|---|---|---|
| Johnson H | Oct 18, 2011 | |
| Alfonso Nieto-Castanon | Oct 18, 2011 | |
| Kaitlin Cassady | Feb 25, 2015 | |
| Kaitlin Cassady | Apr 8, 2015 | |
| Alfonso Nieto-Castanon | Apr 9, 2015 | |
| Sheeba Arnold | Feb 21, 2012 | |
| Alfonso Nieto-Castanon | Feb 23, 2012 | |
| Johnson H | Oct 19, 2011 | |
| Mary Newsome | Dec 14, 2011 | |