Vroom's Expectancy Theory
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.
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The social identity theory of leadership views leadership as a group process. Social identity is a person's sense of who they are based on their group membership. Social identity theory sets agendas and goals generated by social categorization, defines who we are based on processes associated with social identity, and motivates to conduct ourselves based on what followers think of the leader.
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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.
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Leadership has been defined in different ways by different sets of scholars. In very simple terms leadership can be defined as the skill of a person to influence an individual or a group for achievement of a goal in a given situation. One can use different dimensions and perspectives to define leadership. Through the evolution of leadership thought, leadership has been defined in various ways discussed here.
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The group and exchange theories of leadership are derived from social psychology. These have their roots in the exchange theory. Leaders from different kinds of relationships with various groups of subordinates. Group theories describe how leaders need to maintain their position in group dynamics.
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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.
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Burns Transformational Leadership Theory
Transformational leadership theory has been defined by James MacGregor Burns as a process where both leaders and followers mutually raise one another to higher levels of morality and motivation. The concept of transforming leader works with teams to garner trust, respect, and admiration while reaching to higher moral positions. The transformational theory of leadership was developed while studying political leaders and how they use charismatic methods to attract people to the values.
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Transactional Theory of Leadership
Transactional leadership theory is based on the concept of rewards and punishments. The transactional management approach assumes that the desires of the leader and follower are different and leaders give followers something in exchange for getting something they want. Transactional leaders expect followers to be compliant and focuses on structure, instruction, monitoring, organization, or performance to get tasks completed on time.
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Rensis Likert studied the patterns and styles of managers and developed four management systems known as Likert's management systems. These styles developed by him are known as Likert management systems. System 1 - Exploitative Authoritative; System 2 - Benevolent Authoritative; System 3 - Consultative and System 4 - Participative.
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Action Centered Leadership is a model developed by John Adair and focuses on the three responsibilities of a leader which are achieving the task, managing the team, and managing individuals. All these action elements are mutually dependent and important for any leader.
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The Systemic Approach to Leadership
The systemic approach to leadership looks at the organization as a whole and focuses on the understanding of the organization as a system. Moving to systems thinking demand managers to view organizations as organic systems. Leaders are also part of this complex system which is constantly undergoing change and evolving. The leaders need to manage the relations and networks within these systems by acting with systemic awareness.
