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Table 3 Internal consistency reliability of CAS test battery

From: Developing a test battery for diagnosis of childhood apraxia of speech in Arabic speakers

Group Items Cronbach’s Alpha
Apraxia
 Group I (N = 10)
6 0.805**
Phonological disorders
 Group II (N = 20)
6 0.799*
Normal
 Group III (N = 40)
6 0.836**
  1. *Acceptable when 0.7 ≤ α < 0.8
  2. **Good when0.8 ≤ α < 0.9