Transformational and charismatic leadership: Assessing the convergent, divergent and criterion validity of the MLQ and the CKS

This study aimed at empirically clarifying the similarities and differences between transformational, transactional, and charismatic leadership. More specifically, the convergent, divergent, and criterion validity of two instruments, the Multifactor Leadership Questionnaire (MLQ-5X) and the Conger and Kanungo Scales (CKS), was explored. It was found that transformational and charismatic leadership showed a high convergent validity. Moreover, these leadership styles were divergent from transactional leadership. With regard to criterion validity, subjective (e.g. satisfaction) as well as objective (profit) performance indicators were assessed. Firstly, results indicated that transformational as well as charismatic leadership augmented the impact of transactional leadership on subjective performance. In addition, transformational and charismatic leadership both contribute unique variance to subjective performance, over and above the respective other leadership style. Secondly, transformational leadership had an impact on profit, over and above transactional leadership. This augmentation effect could not be confirmed for charismatic leadership. Furthermore, transformational leadership augmented the impact of both transactional and charismatic leadership on profit. Implications for leadership theory and practice are discussed.