Answer:
giving more attention to employees increases worker productivity, if they think managers care about them.
Explanation:
Hawthorne effect establishes that when the workers are observed they improve their productivity. When the initial experiment was done, the investigators were trying to prove that the improvement of workers environment increases the productivity; when they improve the lighting conditions the productivity improved, but when the study finished the productivity was reduced again. In that way they realized that when the workers are observed they improve their productivity because they feel that the managers care about them and their results.