Table 8: Standardized and (raw) Cronbach’s alphas for level of disability.

SubscaleMean Cronbach’s alpha by level of disability
IIIIIIIVV

Self-care0.91730.85310.56120.91900.8813
Mobility0.91880.80930.67830.8482(0.6070)
Assuming a student's role—preschool/elementary school students0.9925····
Assuming a student's role—secondary school students···1.0000·
Expressing learning—students unable to use speech0.95151.0000·(0.0259)(0.6116)
Expressing learning—all students 0.9063−0.2871·0.8455·
Behavior0.93220.41550.98830.95470.7889

(·) signifies 3 or fewer observations; therefore, Cronbach’s alpha is not computed.