Assessing the Discriminative Ability and Internal Consistency of the School Outcomes Measure

Table 7

Standardized Cronbach’s alphas for age.

Subscale	Mean Cronbach’s alpha by age group
	3–5 years old	6–11 years old	12–15 years old	Greater than 16 years old
Self-care	0.9153	0.9700	0.9154	0.9459
Mobility	0.9585	0.9780	0.9533	0.9731
Assuming a student's role—preschool/elementary school students	0.9810	0.9942	·	·
Assuming a student's role—secondary school students	·	·	·	0.9994
Expressing learning—students unable to use speech	0.8018	0.9556	·	·
Expressing learning—all students	0.6545	0.8932	·	1.0000
Behavior	0.8985	0.9513	0.9950	0.9439

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