Table 1.

4-step protocol for contextualized measurement scale adaptation.

Step	Research Question	Method	Alternative Procedure
1	Is the psychological concept found?	Qualitative interviews using grounded-theory approach.	If concept is not understood or it has different dimensions: develop new items for potentially measuring these new understandings and dimensions.
2	Are the measurement scale and its items understood?	Qualitative interviews using think aloud approach.	If items are not understood, reasoning does not match intended conceptualization: exclude items from measurement scale.
3	Is the measurement scale valid and reliable?	Quantitative survey with minimum two survey waves.	If items do not fit in factor analysis; criterion validity; internal consistency; test–retest reliability: exclude items from scale.
4	How do the items perform individually?	Quantitative survey with minimum two survey waves.	See [3].

Note. 4-step protocol summary with research questions for every step and proposed method to answer research question.