McClelland's Theory of Needs is a human motivation theory which states that an individual's specific needs are acquired over time through our culture and life experiences. As per the three needs theory, these acquired needs significantly influence the behavior of an individual. The three main driving motivators are the needs for achievement, affiliation, and power.
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.
University of Iowa Studies was the first leadership study to analyze leadership using scientific methodology. The study was conducted by Lewin, Lippitt, and White and worked on different styles of leadership. The studies explored three leadership styles - authoritarian, democratic, and laissez-fair leaders. This early study was very influential and established three major leadership styles.
The Valence Model of Leadership
The valence model of emergent leadership is based on a group-development sequence. As per the valence model, the process of emergent leadership passes through three distinct stages; Orientation, Conflict, and Emergence. Group members willingly start following and obeying the leader who has passed the "emergence threshold."
The great man theory of leadership is a 19th-century idea that states a person is either a natural-born leader or not. Some people are born with the necessary leadership attributes that help them create a great impact on society, politics, or the military. The theory focuses on identifying the innate qualities and characteristics possessed by great men.
Life cycle theory of Leadership
Situational Leadership Theory was first introduced in 1969 as the life cycle theory of leadership. This theory suggests that type of leadership style appropriate in a given situation depends on the maturity of the follower. As per life cycle theory, leader need to match the leadership style according to the situation and leader behavior varies as the group matures.
The open systems model of leadership acknowledges the influence of the environment on organizations. An open system regularly exchanges feedback with its external environment. The environment also provides key resources that are necessary to sustain and lead to change and survival. Leadership in an open system should focus on influence, open communication, and patterns to control expanding the number of variables created by external dynamics.
Hawthorne Studies - Leadership
The Hawthorne studies were conducted on workers at the Hawthorne plant of the Western Electric Company by Elton Mayo and Fritz Roethlisberger in the 1920s. This study established the behavioral change that happened due to an awareness of being observed, resulting in active compliance with the supposed wishes of researchers, because of special attention received, or positive response to the stimulus being introduced.
In this study of power, Raven identified five bases of power as coercive, reward, legitimate, referent, and expert. The 5 Types of Power can help you decide when it is appropriate to use a particular type of power in important situations. Leadership involves authority and it is very important for leaders to understand what type of power they're using.
Servant Leadership is a recent revolutionary theory of leadership that focuses on leaders achieving authority rather than power. A servant leader considers the needs of others and tries to serve the followers by becoming a servant first. Servant leadership is leading with a desire to better serve others.
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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