Which psychologist is known for the Hierarchy of Needs Theory?

The Hierarchy of Needs Theory is a fundamental psychological framework developed by Abraham Maslow. This theory posits that human needs are arranged in a hierarchical order, consisting of five levels: physiological needs, safety needs, love and belonging needs, esteem needs, and self-actualization needs. Maslow argued that individuals are motivated to fulfill these needs sequentially, starting from the most basic physiological necessities and moving up to higher-level psychological needs. Only once a lower level of needs is satisfied can a person focus on higher-level needs, ultimately striving for self-actualization, which represents the realization of one's full potential.

In contrast, the other individuals listed are known for different contributions to psychology and management. Douglas McGregor is recognized for his theories on motivation in the workplace, specifically Theory X and Theory Y. Victor H. Vroom is known for the Expectancy Theory of motivation, which focuses on the mental processes regarding choice, while John Adams is famous for Equity Theory, which deals with how individuals perceive fairness in social exchanges. Each of these psychologists has made significant contributions to their respective fields, but none are associated with the Hierarchy of Needs, making Maslow the correct answer in this context.