Objective: A physical activity motivation climate, characterized by autonomy support, is important for physical activity participation and adherence. The research aimed to examine the validity, reliability, and measurement invariance of the Physical Activity Motivation Climate Questionnaire (PAMCQ) for autonomysupport perception measurement.

Methods: A sample of 407 Chinese completed a questionnaire package. The PAMCQ�s validity (factorial validity and nomological validity), reliability (internal consistency and composite reliability), and measurement invariance across gender and age, were subsequently tested.

Results: Confirmatory factor analysis (CFA) supported the factorial validity of the scale. Its nomological validity was corroborated by its association with conceptually linked construct. The Cronbach�s alpha coefficient and composite reliability score indicated sufficient reliability of the PAMCQ. Measurement invariance of the scale was also found across gender and age through multi-group CFA.

Conclusion: Overall, findings from the present research suggest the PAMCQ holds adequate psychometric properties to measure perception of an autonomy-supportive motivation climate in the physical activity context. It can be used in future pertinent research as a valid and reliable tool.