How Emotional Contagion at Work Shapes Every Meeting
Think about the last tense meeting you attended. Maybe a client was upset, or a forecast missed its target. At first the pressure was obvious. Then one person spoke slowly and evenly, and the room settled. That shift is an example of emotional contagion at work, and research now shows it reaches further than most leaders assume. In fact, a 2025 study suggests that teams pick up more than each other’s emotions. They also pick up the way their colleagues manage those emotions.
What is emotional contagion?
In 1993, psychologists Elaine Hatfield, John Cacioppo and Richard Rapson described emotional contagion as the tendency to automatically mimic and synchronize with other people’s expressions, voices and postures. As a result, our own feelings move toward theirs. The process is fast and largely unconscious. Moreover, their research found that other people’s nonverbal cues shape our own emotions more than their words do.
Later, Sigal Barsade of the Wharton School tested the idea with work groups. She placed a trained actor in each group and had him convey a specific mood. When he conveyed a positive mood, the group cooperated more and reported less conflict. Barsade called this “the ripple effect.”
Those findings established that emotions spread between people. However, one question remained open: does the skill of regulating emotion spread as well?
The 2025 study on emotion regulation contagion
In February 2025, researchers from Harvard Business School, Stanford, Princeton and the Hebrew University of Jerusalem published a study in Nature Communications. The team included James J. Gross, one of the leading researchers in emotion regulation.
The authors deliberately chose a highly charged setting: a real political conflict. Here is how they ran the experiment:
- 2,659 participants joined online groups of six.
- Each group viewed emotionally charged images and shared reactions in a text chat over 20 rounds.
- Before the task, the researchers trained between zero and six members of each group in cognitive reappraisal, a technique for reinterpreting a situation so it carries less negative weight.
- The remaining members received a neutral instruction to simply observe.
Key findings
1. Untrained members became calmer too. People who never received any training reported less negative emotion when their group included trained colleagues.
2. The effect has a threshold. With only one trained member, the change was small. Once roughly 40% of the group was trained, the authors observed reliable group-level change. At 80%, untrained members’ negative emotion dropped by nearly 0.3 standard deviations.
3. Language spread along with the calm. Using AI-based text analysis, the researchers found that untrained participants began writing more like the trained ones. In other words, they adopted the same reinterpretation patterns.
4. The effect showed up in private answers as well. In a follow-up survey that no other group member would see, participants from groups with more trained members expressed less hostility toward the other side.
The authors note several limits. The groups were small and communicated only through text. They also point out that compliance with the group may explain part of the effect. Even so, the core result is clear: regulating emotion is a social act, and it spreads.
What emotional contagion at work means for leaders
If calm can spread in a polarized political discussion, it can also spread in a board meeting, a negotiation or a quarterly review. The study did not test companies directly. Still, its findings point to three practical lessons for emotional contagion at work.
Your emotional state is information for the whole team. Teams read a tense leader quickly, and they read a composed one just as fast. Research by Sy, Côté and Saavedra (2005) found that leaders’ moods spread to groups more strongly than other members’ moods do.
One calm person helps, but a critical mass changes the group. According to the 2025 data, group-level change appeared when a substantial share of members shared the skill. Therefore, training a single manager is a reasonable start. Training a core group within a team, however, is far more likely to shift its climate.
Written communication carries emotion. The participants never saw each other’s faces, yet regulation still spread through text. For that reason, chat threads, emails and document comments deserve the same care as face-to-face meetings.
Three practices to manage emotional contagion at work
- Reappraise before a difficult meeting. Ask yourself what else the situation could mean. For example, “The client is attacking us” can become “The client is worried about their results.”
- Lower your pace and your volume. Your voice and posture are the first signals others mimic. Consequently, small changes in delivery can shape how the whole group responds.
- Reframe in writing during a crisis. When a thread starts to escalate, a message that reframes the problem can bring the temperature down for everyone reading it.
Related reading: https://neurobusiness.us/designing-behavior-change/
Frequently asked questions
What is emotional contagion at work?
It is the transfer of emotions between colleagues through automatic mimicry of expressions, tone and posture. It affects team mood, cooperation and conflict.
Can emotion regulation spread between people?
Yes. A 2025 study in Nature Communications found that people became calmer when their group included members trained in cognitive reappraisal, even without training themselves.
How many people need to stay calm to change a group?
In the study, reliable group-level change appeared once about 40% of members were trained. The authors note that this threshold may vary in other settings.
Final thought
Most teams have someone who brings steadiness when things get complicated, and that person rarely hears how much it matters. The research now gives you a concrete reason to tell them. Share this article with them and acknowledge the role they play.
References
Sy, T., Côté, S., & Saavedra, R. (2005). The contagious leader: Impact of the leader’s mood on the mood of group members, group affective tone, and group processes. Journal of Applied Psychology, 90(2), 295–305.
Pinus, M., Cao, Y., Halperin, E., Coman, A., Gross, J. J., & Goldenberg, A. (2025). Emotion regulation contagion drives reduction in negative intergroup emotions. Nature Communications, 16, 1387.
Hatfield, E., Cacioppo, J. T., & Rapson, R. L. (1993). Emotional contagion. Current Directions in Psychological Science, 2(3), 96–99.
Barsade, S. G. (2002). The ripple effect: Emotional contagion and its influence on group behavior. Administrative Science Quarterly, 47(4), 644–675.