Which study conducted in the 1920s focused on the effects of lighting and cleanliness on worker productivity?

• A. Hawthorne Studies
• B. Theory Z
• C. Maslow's Hierarchy of Needs
• D. McGregor's X and Y Theory

Answer: (A)

The key idea is that worker productivity is shaped by social and psychological factors, not only by physical conditions. In the 1920s, researchers at Western Electric’s Hawthorne Works in Chicago ran experiments starting with lighting levels and other working conditions to see how output would change. Although they initially looked at lighting and cleanliness, the surprising finding was that productivity tended to rise when workers felt observed and cared about, and when they were part of a responsive social environment. This attention and interaction—the Hawthorne effect—showed that morale, supervision, and group dynamics can drive performance as much as any physical change in the workplace. Thus, the study that focused on lighting and cleanliness within this broader inquiry is the Hawthorne Studies. Other well-known theories you might encounter describe motivation or management styles developed later, but they aren’t the 1920s industrial study that revealed these social factors.