Table 4.

Cronbach’s alpha values for STEMPCK scale and its component factors.

STEMPCK scale and factor	Greek	Turkey	Total data
STEMPCK scale	0.85	0.88	0.90
Pedagogical knowledge	0.82	0.84	0.87
Science knowledge	0.79	0.83	0.85
Technology knowledge	0.78	0.82	0.86
Engineering knowledge	0.81	0.85	0.87
Mathematical knowledge	0.77	0.79	0.84
21st-century skills knowledge	0.80	0.83	0.91