Research: When Extra Effort Makes You Worse at Your Job

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.