"Intelligence is but one characteristic that people bring with them when they join an organization. In this chapter, we look at how biographical characteristics (such as gender and age) and ability (which includes intelligence) affect employee performance and satisfaction. Then we show how people learn behaviors and what management can do to shape those behaviors" (p. 33).

Of interest to scholars throughout the 20th century, the trait approach was one of the first systematic attempts to study leadership. In the early 20th century, leadership traits were studied to determine what made certain people great leaders. The theories that were developed were called “great man” theories because they focused on identifying the innate qualities and characteristics possessed by great social, political, and military leaders (e.g., Catherine the Great, Mohandas Gandhi, Indira Gandhi, Abraham Lincoln, Joan of Arc, and Napoleon Bonaparte). It was believed that people were born with these traits, and that only the “great” people possessed them. During this time, research concentrated on determining the specific traits that clearly differentiated leaders from followers (Bass, 1990; Jago, 1982).

In the mid-20th century, the trait approach was challenged by research that questioned the universality of leadership traits. In a major review, Stogdill (1948) suggested that no consistent set of traits differentiated leaders from nonleaders across a variety of situations. An individual with leadership traits who was a leader in one situation might not be a leader in another situation. Rather than being a quality that individuals possess, leadership was reconceptualized as a relationship between people in a social situation. Personal factors related to leadership continued to be important, but researchers contended that these factors were to be consid-ered as relative to the requirements of the situation.

The trait approach has generated much interest among researchers for its explanation of how traits influence leadership (Bryman, 1992). For example, an analysis of much of the previous trait research by Lord, DeVader, and Alliger (1986) found that personality traits were strongly associated with individuals’ perceptions of leadership. Similarly, Kirkpatrick and Locke (1991) went so far as to claim that effective leaders are actually distinct types of people in several key respects.