A study was conducted to analyze B.M. Bass and B.J. Avolio's concept of transformational leadership by comparing their Multifactor Leadership Questionnaire (MLQ) with the Managerial Practices Survey (MPS) of G.A. Yukl. The MPS advocated scales related to idealized influence, inspirational motivation, personal considerations and intellectual stimulation. On the other hand, the MPS supported four scales on managerial practices, namely clarifying, supporting, inspiring and team building. Results indicated differences between the constructs determined by the scales. Findings also showed that a composite determinant of transformational leadership supported a variance in leadership effectiveness ratings.