Second, reliability analysis is used to construct reliable measurement scales. In this study, implementing Cronbach's alpha is used as an estimate of the number of test items and the average inter-correlation among the items (organizational commitment, job involvement, transformational leadership). Higher Cronbach's alpha is associate with higher inter-correlation. If this outcome Cronbach's alpha reach above 0.7, it would be an acceptable reliability coefficient; if Cronbach's alpha is between 0.7 and 0.35, it means that reliability is questionable; if value is lower than 0.35, it means that the reliability is low (Nunnally 1978).
