Table 6: Cronbach’s alphas for all items in subscales.

Subscale Cronbach’s alpha

Self-care 0.9546
Mobility 0.9721
Assuming a student's role—preschool/elementary school 0.9897
Assuming a student's role—secondary school 0.9994
Expressing learning—students unable to use speech 0.9289
Expressing learning—all students 0.8769
Behavior 0.9380