From: Development and validation of a self-regulation scale within the German version of the Early Development Instrument
age
N
Cronbach's alpha
Internal consistency
3 y
46
0.92
4 y
65
0.9
5 y
55
6 y
18
0.89
overall
184
N (pairs)
ICCs (CI)
Test–retest reliability
across age groups
25
0.85 (0.71 to 0.93)
Interrater reliability
17
0.71 (0.43 to 0.89)