Table 5.
Experiment 4: 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 5 components.
| Method of Generating Maps | Group ICA Source | Mean Correlation With Subject-Specific Map (95% Confidence Interval) | Same = Seed Null Hypothesis Test | |||
|---|---|---|---|---|---|---|
| Task-Related | Group ICA | t | df | P | ||
| Single-voxel seed (SV) | PICA | 0.57 (0.45–0.68) | 0.47 (0.43–0.51) | 2.0 | 13 | .06 |
| 9-voxel ROI seed (FV) | PICA | 0.81 (0.73–0.86) | 0.53 (0.49–0.57) | 5.8 | 13 | <.001 |
| 40-voxel ROI seed (MV) | PICA | 0.83 (0.77–0.87) | 0.56 (0.52–0.60) | 7.0 | 13 | <.001 |
| Dual regression, 1 spatial map (DRS) | PICA | 0.77 (0.67–0.83) | 0.59 (0.57–0.61) | 3.7 | 13 | .002 |
| Dual regression, all spatial maps (DRA) | PICA | 0.57 (0.46–0.65) | 0.62 (0.59–0.64) | −1.2 | 13 | .24 |