White matter impairment in the speech network of individuals with autism spectrum disorder.

To verify that handedness differences between the two groups (which were borderline significant; see Table 1 ) did not contribute substantially to the finding of reduced left SMA–vPMC tract strength in ASD participants, we performed three linear regressions to examine the relationship between handedness (Edinburgh score) and the strength of this tract in each group separately and both groups combined.

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