Fred Fiedler developed contingency theory and proposed the Fiedler contingency model in 1967. The model suggests that effective leadership depends on matching a leader's style to the situation. A leader's style is identified as either task-oriented or relationship-oriented using the Least Preferred Coworker questionnaire. The model then evaluates three factors - leader-member relations, task structure, and position power - to define the situation. Depending on these factors, there are eight potential situations. The model matches leader styles to situations to maximize effectiveness, either by changing the leader or changing aspects of the situation.