Fig. 3.

Constructed decision trees for screening ADHD: (A) Model A (class+playtime) and (B) Model B (class hours) (G = gravity acceleration; Vmean = variance of mean; VHR1.8/VHR3.2 = variance of high-level activity ratio (>1.8G and >3.2G, respectively); VHR1.8 = variance of high-level activity ratio (>1.8G); MHR1.6/MHR2.0/MHR3.2 = mean of high-level activity ratio (>1.6G, >2.0G and >3.2G, respectively); VLR0.6/ VLR0.7/ VLR0.8/ VLR1.0 = variance of low-level activity ratio (<0.6G, <0.7G, <0.8G and <1.0G, respectively)