Figure 4.
Inhibitory tone is regulated differently in men with and without autism spectrum disorder (ASD). The change in inhibitory index was negatively correlated with changes in Glx in controls (Pearson correlation; r=−0.705, P<0.01), but not men with ASD (r=0.357, P=0.28). Furthermore, there was a significant group difference in correlation coefficient (Fisher r to z transform, z=2.23, P<0.01). Results are expressed as z-scores ((value−mean)/standard deviation) and are corrected for State anxiety score.