Table. 1.

The concepts and item parameters (Cronbach' Alpha).

Group Concept Items Number Difficulty Index Discrim-ination Index Point-Biserial
1 Direction of action- reaction force 1 0.19 0.53 0,60
4 0.26 0.63 0.60
9 0.55 0.74 0.45
2 Magnitude of action-reaction force 2 0.21 0.53 0.64
5 0.16 0.56 0.73
7 0.15 0.37 0.52
3 Force of object on rest 3 0.12 0.32 0.42
6 0.11 0.32 0.47
8 0.17 0.41 0.46
New Phys.: Sae Mulli 2022;72:311~318 https://doi.org/10.3938/NPSM.72.311
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