Table 7.
Experiment 5: mean correlations of subject-specific FC spatial maps with (1) the task-related GLM map for the same subject (“Task-Related” column) and (2) the group IC of interest (“Group IC” column). Results of a paired t-test comparison of the mean correlations are shown in the rightmost columns. These results were based on a group ICA that produced 30 components.
| Method of Generating Maps | Group ICA Source | Mean Correlation WithSubject-Specific Map(95% Confidence Interval) | Same = SeedNull HypothesisTest | |||
|---|---|---|---|---|---|---|
| Task-Related | Group ICA | t | df | P | ||
| Single-voxel seed (SV) | PICA | 0.82 (0.75–0.88) | 0.48 (0.44–0.52) | 7.5 | 13 | <.001 |
| 9-voxel ROI seed (FV) | PICA | 0.84 (0.77–0.89) | 0.49 (0.45–0.53) | 7.5 | 13 | <.001 |
| 40-voxel ROI seed (MV) | PICA | 0.85 (0.79–0.89) | 0.50 (0.45–0.54) | 8.3 | 13 | <.001 |
| Dual regression, 1 spatial map (DRS) | PICA | 0.88 (0.84–0.92) | 0.51 (0.48–0.54) | 9.8 | 13 | <.001 |
| Dual regression, all spatial maps (DRA) | PICA | 0.43 (0.36–0.49) | 0.52 (0.48–0.55) | −4.0 | 13 | .002 |