The four theory of leadership was formulated after studying hundreds of leaders and the model includes four basic dimensions of effective leadership - support; interaction; facilitation; goal emphasis, and work facilitation. This model was tested as a predictor of an organization's effectiveness.
Socio-technical theory of leadership focus on the presence of two subsystems in every organization, the interrelatedness of social and technical aspects of an organization. Theory pertains to the social aspects of people and technical aspects of an organization, which means structure and processes within the organization.
The Vroom-Yetton model is designed to optimize for the current situation the leadership style for best decision-making. Its a decision model formulated with contribution from Arthur Jago on how to make group decisions. The leader must gather information from the team prior to making the decision and involves more people in the decision process.
Idiosyncrasy Credit Model of Leadership builds upon the awareness that when the emergent leader meets the team's expectations, idiosyncrasy credits are awarded. These credits depend on how the leader fulfilled follower's expectations and what is the impact of the leader's decisions on the follower. When the balance of credits shifts, another leader will emerge.
The psychodynamic approach to leadership has its roots in the work done by Sigmund Freud. These involved psychological theories of personality development and explaining leadership using psychoanalytic concepts. It tries to define a person is in terms of personality traits. Personality structured into three parts (i.e., tripartite) - the id, ego, and superego.
Early studies on leadership were done at Ohio State University using the Leader Behavior Description Questionnaire to identify the leader's observable behaviors. Ohio State study on leadership found two behavioral characteristics of leadership - people-oriented (consideration) and task-oriented (initiating structure) leadership style.
Jung first introduced his personality theory and explained that all humans have a natural impulse to relate meaningfully to the world through productive work and people through significant relationships. He used four psychological functions - thinking and feeling (rational functions) and sensation and intuition (irrational functions). He also used introversion and extraversion and its impact on appropriate leader behaviors.
Leadership Participation Inventory (LPI)
Kouzes and Posner introduced the Leadership Participation Inventory model of Transformational leadership. This model is also known as Kouzes and Posner's Leadership Challenge Model. They identified five practices of exemplary leadership - Model the Way, Inspire a Shared Vision, Challenge the Process, Enabling Others to Act, and Encourage the Heart.
Substitutes for leadership theory is based on understanding the context within which leadership occurs. Different situational factors can enhance, neutralize, or substitute for leader behaviors like under certain circumstances, situational factors may substitute for leadership. These substitutes are of two types - substitutes and neutralizers. Substitutes take away from the leader's power and help group members increase their performance. Neutralizers only remove influence from the leader.
Theory Z also called the "Japanese Management" style is a leadership theory of human motivation focused on organizational behavior, communication, and development. It assumes that employees want to enter into long term partnerships with their employers and peers. Offering stable jobs with an associated focus on the well-being of employees results in increased employee loyalty to the company.
Transactional Analysis also is known as the theory of human personality was proposed by Eric Berne in the 1950s. This theory of transactional leadership defines three different ego states in a person who engages in transactions with another person's ego states. These three ego states refer to major parts of an individual's personality and reflect an entire system of thought, feeling, and behavior.
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