Table 4: Differences in subscale sum scores by age.

Source (age group)DFType III SSMean square valuePr >

Self-care3356.8042219118.93474062.720.0510
Mobility31608.065248536.0217492.410.0773
Assuming students role—preschool/elementary157.3015873057.301587300.180.6799
Assuming student’s role—secondary1120.3333333120.33333330.270.6547
Expressing learning—unable to use speech372.6747863224.224928771.550.2198
Expresses learning—all students3137.392973745.79765792.580.0727
Behavior3245.914242481.97141412.460.0708