Final answer:
Elton Mayo conducted the Hawthorne Experiments, which focused on interpersonal relations, motivation, and organizational dynamics.
Step-by-step explanation:
Elton Mayo, a humanistic management theorist, conducted the Hawthorne Experiments. From 1929 to 1932, Mayo and his colleagues conducted a series of studies at Western Electric's Hawthorne Works. These studies focused on interpersonal relations, motivation, and organizational dynamics, and marked the origin of organizational psychology. The researchers initially studied the effects of the physical work environment but found that psychological and social factors had a greater impact. These studies were crucial in the development of organizational psychology and marked a shift from traditional approaches to a more human-centric view of management and work environments. The Hawthorne Experiments moved the focus from the physical conditions of the workplace to including the psychological and social aspects as factors that significantly influence employee productivity and satisfaction.