Impulsivity as a sufficient mediator of the difference in head motion between ADHD and TDC in the mediation analysis.

Path coefficients are shown next to arrows indicating each link in the analysis. For the group difference in head motion, the value above the arrow indicates the zero-order correlation, and the value below the arrow represents the correlation after controlling the mediator of impulsivity. All values represent standardized betas. * indicates p < 0.01, ** indicates p < 0.001, two-tailed. ADHD: attention deficit hyperactivity disorder; TDC: typically developing children.