<![CDATA[Every human being is endowed with emotions that can be well-controlled, as evidenced by the ability to regulate emotions. The gap relates to the understanding of emotional regulation in the context of drug addiction by addiction counselors, especially for Muslim clients who face emotional conflict, social pressure, and spiritual dynamics during the recovery process. Because the ability to regulate emotions in Muslim addicted clients actually impacts self-recovery, but its measurement hasn’t yet been used with relevant assessments. Therefore, the purpose of this study was to develop and test the validity and reliability of the emotional regulation scale for Muslim drug-addicted clients undergoing rehabilitation. The study used a sequential explanatory design with a qualitative form content validity stage for construct development through theoretical review, validation by three experts (religion, psychology, and addiction counseling), and readability testing. Then, the quantitative stage was completed by testing the instrument on 49 rehabilitation clients to test construct validity and reliability. Data analysis used descriptive qualitative analysis and quantitative analysis using Aikan-V, product-moment, and Cronbach's alpha. Logical validity in content validity showed a CVI value of 0.917, indicating very high feasibility. All items correlated with the minimum limit (value>0.2329) were declared empirically valid. Reliability testing using the Rasch model with a Cronbach's alpha value of 0.71 and item reliability of 0.94, indicating good internal consistency. The results of the study confirmed that the regulation emotions scale is suitable for use as an assessment to support addiction counseling services.]]>
