Then it was developed by Robert House (1971). In 1996 it was revised again by Robert House. According to House, the essence of the theory is "the meta-proportion by which leaders, to be effective, engage in behaviors that complement the environment and capabilities of their subordinates in a way that compensates for deficiencies and is decisive for the satisfaction of subordinates and individual and work unit performance. Path goal theory identified four types of situations: followers lacking self-confidence, ambiguous work, lack of challenging work, and incorrect reward. This theory also identified four types of leadership behaviors to deal with these situations: supportive, directive, achievement-oriented, and participative. These four leadership behaviors depend on environmental factors and follower characteristics. The main characteristic of path goal theory is its flexibility. The four leadership styles are flexible and a leader can adopt any of the four leadership styles depending on the situation.