Passage: The 'Hawthorne Effect' refers to a type of reactivity in which individuals modify an aspect of their behavior in response to their awareness of being observed. The phenomenon was first identified during a series of studies at a telephone manufacturing plant in the 1920s. Researchers found that productivity increased not because of changes in lighting or physical work conditions, but simply because the workers felt that management was paying attention to them. In a modern management context, this suggests that employee performance can be influenced by psychological factors as much as by physical environment or financial incentives. While the Hawthorne Effect can lead to temporary boosts in productivity, its effects often diminish once the novelty of the observation wears off. Managers must therefore look for sustainable ways to improve motivation, rather than relying on short-term observation-driven increases. This highlights the importance of genuine engagement and a supportive organizational culture in maintaining long-term productivity.