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help > Reporting statistics from ICC findings
Feb 27, 2018 08:02 PM | Leah Fleming - Yale University
Reporting statistics from ICC findings
Hi Alfonso and fellow CONN users,
I have two questions regarding reporting statistics:
1. This may be a very simple question and I have just been looking in the wrong places. I am using a design with (within-subject; -1, 1) pre vs. post-drug administration conditions, and (between subjects; 1, -1) drug vs. placebo groups (also controlling for the site of the scan). I am hoping to report the mean and standard deviation correlation values for the two drug groups (post-pre difference) and am having trouble finding this information for my voxel-to-voxel ICC analysis in the regions that were significantly different across groups (or finding each participant's connectivity values at these significant voxels so I can manually calculate the mean and SD per group). What is the best way to find or calculate these values?
2. Also you mentioned in a previous post that the Beta Value should be reported (from the plot effects tab) in addition to the t-values. Would this also be appropriate given my design? And what exactly do these values represent? From the title of the graph for the plot effects tab, it seems like this effect size is only looking at the difference in average connectivity across the conditions ("-pre_IntrinsicConnectivity_1+post_IntrinsicConnectivity_1") without considering the drug vs. placebo groups, which does not seem useful to report.
Thanks so much!
Leah
I have two questions regarding reporting statistics:
1. This may be a very simple question and I have just been looking in the wrong places. I am using a design with (within-subject; -1, 1) pre vs. post-drug administration conditions, and (between subjects; 1, -1) drug vs. placebo groups (also controlling for the site of the scan). I am hoping to report the mean and standard deviation correlation values for the two drug groups (post-pre difference) and am having trouble finding this information for my voxel-to-voxel ICC analysis in the regions that were significantly different across groups (or finding each participant's connectivity values at these significant voxels so I can manually calculate the mean and SD per group). What is the best way to find or calculate these values?
2. Also you mentioned in a previous post that the Beta Value should be reported (from the plot effects tab) in addition to the t-values. Would this also be appropriate given my design? And what exactly do these values represent? From the title of the graph for the plot effects tab, it seems like this effect size is only looking at the difference in average connectivity across the conditions ("-pre_IntrinsicConnectivity_1+post_IntrinsicConnectivity_1") without considering the drug vs. placebo groups, which does not seem useful to report.
Thanks so much!
Leah
