Size and spatial extension of effects
| Congruent | Incongruent | |||
|---|---|---|---|---|
| Partial β (t score) | % voxels | Partial β (t score) | % voxels | |
| sdRT | ||||
| FA | −0.53 (−9.53) | 27.5 | −0.44 (−6.37) | 5.6 |
| AD | 0.55 (12.68) | 26.2 | 0.46 (8.07) | 1.3 |
| RD | 0.49 (9.21) | 49.0 | 0.38 (5.64) | 21.4 |
| MD | 0.45 (9.31) | 49.8 | 0.37 (5.93) | 24.1 |
| mRT | ||||
| FA | 0.34 (4.93) | 2.1 | ||
| AD | 0.35 (4.43) | 1.9 | ||
| RD | −0.31 (−4.43) | 0.6 | ||
| MD | 0.31 (3.97) | 0.6 | ||
To illustrate the strength of the effects, multiple regression analyses were run. The partial βs for sdRT are controlled for age, sex, and mRT; the partial βs for mRT are controlled for age and sex. The partial β statistics for the congruent condition are based on diffusion values from each voxel where a significant relationship of at least p < 0.001 (uncorrected) between the RT measure and diffusion was found in the whole-skeleton analyses. For the incongruent condition, the effects were too weak to survive such a conservative threshold, so a threshold of p < 0.01 was chosen to illustrate the effects. Based on the same reasoning, a threshold of 0.05 (corrected) was chosen for the mRT analyses. % voxels denotes the percentage of the voxels in the skeleton that showed a significant relationship of at least p = 0.05, fully corrected for multiple comparisons across space.