Research: When Extra Effort Makes You Worse at Your Job

How to encourage proactivity without weakening performance.
Author(s): Mouna El Mansouri, Karoline Strauss, Doris Fay
Publisher: Harvard Business Review
Date of publication: 2025
Read this article on the publisher's website [Harvard Business Review]
Summary
This study demonstrates that proactivity comes at a real cognitive cost. The authors measured that on days when employees take more initiatives, their ability to accomplish complex tasks decreases by day’s end. A useful reminder: to encourage proactivity without exhausting your teams and weakening their performance, you also need to adjust working arrangements and to protect mental resources.
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