“…In contrast, the contingency or situational approach emphasizes variables in the particular organizational situation under examination that will moderate the effectiveness of different leadership behaviors (Avolio, Howell, & Sosik, 1999;Fiedler, 1967;Graeff, 1983;Hersey & Blanchard, 1977;Howell, Dorfman, & Kerr, 1986). A variant of this approach, and a popular research thrust in recent years, is leader-member exchange theory, in which the unit of analysis, the dyadic relationship between a leader and individual members of a work group, suggests that leaders develop different types of relationships with different members (Phillips & Bedeian, 1994;Schriesheim, Neider, & Scandura, 1998;Sparrow & Liden, 1997;Wayne, Shore, & Liden, 1997). In the transformational, visionary, or charismatic approach, leaders are seen as "managers of meaning" (Bryman, 1996: 280) who raise the aspirations of followers in such a way that the leaders' and followers' aspirations are fused (Bass, 1985;Burns, 1978;Pawar & Eastman, 1987;Shamir, House, & Arthur, 1993).…”