Table 1.

Content validity calculation and effectiveness statistical analysis.

Part	Calculation Method	Formula/Statistical Analysis	Reference
I	Item-level Content Validity Index (I–CVI)	$I-CVI=\frac{agreed item}{total number of experts}$	Polit et al., (2007) [10], Norlia & Faizah (2016) [15]
II	Content Validity Level	$Content Validity Level=\frac{total expert score}{total maximum score}\times 100$	Sidek & Jamaludin (2005) [12], Clayton (2009) [9], Mat Rasik & Ismail (2019) [16], Zaharen, Saper & Nasir (2019) [17]
III	Effectiveness of Module	Generalized Linear Model-Mixed Design ANOVA	-