Leader Expertise as a Moderator of the Effects of Instrumental and Supportive Leader Behaviors
研究检验了领导者专长对工具性和支持性领导行为与下属角色模糊之间关系的调节作用，发现专长能增强这两种领导行为减少角色模糊的效果。
Recently, both Hollander (1978) and House and Baetz (1979) have stressed the importance that a leader's competence or expertise has on a leader's effectiveness. Despite this, however, few empirical studies have been conducted in the past decade to examine the potential impact of leader expertise. The present study was designed to test for the moderating effects of leader expertise on the relation-ships between instrumental and supportive leader behaviors and subordinates' perceived role ambiguity. The results show that leader expertise moderated the effects of both instrumental and supportive leader behavior on role ambiguity.