Direct effect pathways of group and mediator variables. α, direct effect of group on potential mediators; b, direct effect of mediator variables on adaptive functioning; c’, direct effect of group on adaptive functioning. WASI MR, Wechsler Abbreviated Scale of Intelligence, Matrix Reasoning subtest; TEA-Ch WDW, Test of Everyday Attention for Children, Walk/Don't Walk subtest; WISC-IV PSI, Wechsler Intelligence Scale for Children, Fourth Edition, Processing Speed Index; CAFAS, Child and Adolescent Functional Assessment Scale; TBI, traumatic brain injury; OI, orthopedic injury; *p < 0.05; **p < 0.01.