Why Do We “Catch” Other People’s Emotions? Understanding Emotional Contagion

Have you ever walked into a room where everyone was bursting with laughter and found yourself smiling, without knowing what was funny? Or how did your own mood shift after spending some time with an anxious friend? These reactions aren’t just a series of coincidences; they might actually be examples of emotional contagion. The tendency for people to unconsciously absorb, mirror, and sometimes come to share the emotional states of those around them (Hatfield et al., 1993).  

People likely experience their feelings becoming influenced as they interact with friends, family, colleagues, crowds, and even by following trends and accounts across social media. Although emotional contagion occurs naturally, understanding the relevance of this process is important as people are constantly connected with each other’s emotions, both online and offline. Rather than being purely positive or negative, emotional contagion is a basic social process that can foster connection, influence group behaviour, and sometimes intensify collective stress.  

What is Emotional Contagion? 

Emotional contagion is the process through which one person’s emotional state is impacted by another one’s emotional state. Hatfield et al. (1993) proposed that people usually automatically mimic and synchronise their expressions, vocalisations, postures, and movements with those of another person, which can contribute to emotional convergence. For example, someone may catch emotions, just like they would catch a cold.  

There is a very important distinction between this phenomenon and empathy. While both are related to feelings of concern and the emotions people might share with each other, empathy involves an understanding of what another person is experiencing emotionally, maintaining the awareness that the feeling belongs to the other person. For instance, you may think, “that person  looks really stressed.”

However, emotional contagion is typically an unconscious and automatic process in which an individual’s body or senses react similarly – almost as if he/she feels like it’s shifted to their own feelings, i.e., “that person looks really stressed, and now I’m also feeling uneasy” (Hatfield et al., 1993; Singer & Lamm, 2009). This illustrates how emotions can move between people through ordinary social interaction. 

Read More: Why Does Watching Someone Struggle Trigger Our Own Anxiety? The Psychology of Emotional Contagion

How Do People “Catch” Emotions? 

It’s a common assumption that emotional contagion is driven by one single psychological factor. But it’s actually the intersection and collaboration of several components such as:

1. The power of your face 

Individuals’ facial expressions tell a lot about how they’re feeling; a smile signals delight. Conversely, tightened lips could suggest frustration, or a furrowed brow can communicate displeasure and so on. When two people interact, it’s believed they instinctively mimic certain aspects of each other’s facial expressions, regardless of whether or not they recognise or are aware of these facial changes (Hess & Fischer,  2013).  

This mimicry can affect a person’s emotional state through a concept known as the facial feedback hypothesis. This proposes that physical facial movements can directly influence emotional experiences. For example, the physical act of smiling can actually make people feel happier. This facial mimicry appears particularly important when people want to accurately perceive someone else’s emotion and understand how they feel  (Palagi et al., 2020). 

2. Body and Voice Send a Message 

Emotions aren’t conveyed exclusively by the face; individuals’ posture, how they move, their gestures, speed of talking, tone and volume of voice can all impact how other people feel. When someone spends time with an energetic or cheerful person, they may become more animated. On the other hand, a person speaking in a slow, monotone voice and looking withdrawn may impact the atmosphere of interaction (Hatfield et al., 1993; Prochazkova & Kret, 2017).  

This can be noticeably observable in group situations where excitement can become collective enthusiasm. An air of panic can put an entire group on the edge of an anxiety-provoking situation. 

Read More: The Psychology of First Impressions

3. Imitation makes Emotions synchronized 

When individuals imitate other people’s expressions or behaviours, they start to sync with the emotional states they express. This mimicry doesn’t necessarily involve deliberately copying another individual but can happen organically in social interactions. Research suggests mimicry allows people to become synchronised in emotion based on observing another person’s emotional behaviour. It can activate corresponding representations and bodily responses in the observer, helping to create interpersonal emotional synchrony (Prochazkova & Kret, 2017).  

However, mimicry alone can’t explain this process. Emotional contagion must necessarily include cognition, sensory processing, attention, social interactions and cognitive interpretation working together (Palagi et al., 2020). 

What Happens in the Brain When People Catch Emotions?

Neuroscience research suggests emotional contagion and emotional mimicry involve partially overlapping neural pathways associated with processing motor skills, emotion, and social understanding (Fu et al., 2025). Among them include brain regions known as the inferior frontal gyrus, inferior parietal areas, the precentral gyrus, the insula, and the cingulate cortex. The mirror neuron system is commonly implicated in this process because some of the regions in the brain work the same way when individuals perform certain actions and when they observe similar actions.  

However, it’s believed that emotional contagion isn’t as simple as just stating “mirror neurons  make people feel what others are feeling.” Some contemporary research has shown that both neural and psychological interacting mechanisms contribute to emotional mimicry and contagion (Prochazkova & Kret, 2017; Fu et al., 2025). A recent study indicates that certain networks of brain areas become similar and synchronised when people interact in very positive situations; they express and display similar facial expressions to one another (Zhu et al., 2025). 

Read More: Why We Copy Each Other Without Realising: The Psychology of Mirroring

Emotional Contagion In Everyday Life 

Emotional contagion becomes particularly significant when people interact repeatedly. 

1. Relationships and friendships

People in close relationships tend to influence each other’s emotional states, and sometimes they start feeling emotions similar to each other as a means to strengthen their personal connections and become more aligned. On the negative side, when someone is constantly going through stressful, difficult experiences, this contagious state of an emotion can eventually lead to distress for everybody close to them (Hatfield et al.,  1993).  

2. Group situations

There has been some research on the contagion of mood in group settings. In one particular study on decision-making groups of managers, it was found that if group members seem particularly enthusiastic and are generally expressing positive sentiments, this has a direct correlation with the productivity and general positive atmosphere in the group; the members have a feeling of less emotional conflict, and the overall performance is high (Barsade, 2002).  

So, it can be said that the overall group’s emotional disposition and behaviours are strongly related to the emotional disposition or displays of the leader. A calm and constructive leader may help create a more stable group atmosphere, while persistent displays of hostility or panic can potentially influence an anxiety-provoking emotional climate around them.

3. Social Networks

Emotional contagion no longer just occurs in our face-to-face interactions but has expanded onto online platforms also. People are constantly exposed to emotions through social media, through positive or negative content.  

A longitudinal study by Fowler and Christakis (2008) of 4,739 participants in the Framingham Heart Study revealed a spread of happiness among members of a social network over 10 years, suggesting happiness is associated with socially connected individuals’ emotional experiences. However, it should not be interpreted as proof that emotions are transmitted in a simple, one-directional manner.  

In today’s digital environment, emotional signals can also travel rapidly through social media. Posts expressing excitement, outrage, fear, or enthusiasm may expose users to emotionally charged content repeatedly.

Read More: Digital Emotional Contagion: Is Stress Transmissible Through Screens and Social Media?  

Is Emotional Contagion Always Good? 

No, not necessarily. The emotional contagion itself is neutral; its effect on people’s thoughts and behaviour not only depends on which emotions are involved but also on the subsequent behaviours. It may play a positive role by:  

• Strengthening social connectedness and sense of belongingness.  
• Boosting interpersonal coordination and cooperation.  
• Making individuals sensitive to their peers’ emotions.
• Fostering a sense of shared enthusiasm and excitement during a celebration or a shared activity.
• Facilitating group unity when the emotions are predominantly positive (Barsade, 2002; Prochazkova & Kret, 2017).

Yet, it may also contribute to:  

• The spreading of anxiety or tension.  
• Amplifying conflict within groups.  
• Emotional exhaustion in highly demanding environments.  
• Difficulty distinguishing one’s own emotions from the absorbed emotions of others.

Awareness of emotional contagion does not imply that people should always avoid contact with negative emotions; rather, the development of awareness and the capacity for intra subjective/inter-subjective distinction can help to remain emotionally supportive towards others without losing people’s emotional autonomy.  

Conclusion

The phenomenon of emotional contagion highlights an important aspect of social behaviour. Emotions not only occur in the private psychological space of an individual, but they are also transmitted through faces, voices, bodies, actions, attentional focus and relationships in the context of social interaction, and such emotional transmission can affect individuals’ states without them fully noticing it (Hatfield et al., 1993; Prochazkova & Kret, 2017).  

However, emotional contagion cannot be mistaken for uncontrollable emotional “infection”. There are differences in emotional regulation, sensitivity, attention and the ability to differentiate between people’s own emotions and others’ (Barsade, 2002; Prochazkova & Kret, 2017). Next time you find yourself experiencing mood shifts when interacting with other people, take a pause and ask yourself, “Why am I feeling this way?” The reason could lie in the “emotional atmosphere” where you have just entered. Indeed, it can be said that sometimes the mood in the room becomes “the mood within us” too. 

References +

• Ashkanasy, N. M., Zerbe, W. J., & Härtel, C. E. J. (Eds.). (2017). Research companion to emotion in organisations. Edward Elgar Publishing. 
• Barsade, S. G. (2002). The ripple effect: Emotional contagion and its influence on group behaviour. Administrative Science Quarterly, 47(4), 644–675. https://doi.org/10.2307/3094912
• Fowler, J. H., & Christakis, N. A. (2008). Dynamic spread of happiness in a large social network: Longitudinal analysis over 20 years in the Framingham Heart Study. BMJ, 337,  a2338. https://doi.org/10.1136/bmj.a2338
• Fu, Y., et al. (2025). The shared neural substrates of emotional mimicry and emotional contagion: An activation likelihood estimation meta-analysis and meta-analytic connectivity modelling analysis. Social Cognitive and Affective Neuroscience, 20(1).  https://doi.org/10.1093/scan/nsaf091 
• Hatfield, E., Cacioppo, J. T., & Rapson, R. L. (1993). Emotional contagion. Current  Directions in Psychological Science, 2(3), 96–100. https://doi.org/10.1111/1467- 8721.ep10770953
• Hess, U., & Fischer, A. (2013). Emotional mimicry as social regulation. Personality and  Social Psychology Review, 17(2), 142–157. 
• Palagi, E., Celeghin, A., Tamietto, M., Winkielman, P., & Norscia, I. (2020). The neuroethology of spontaneous mimicry and emotional contagion in human and non-human animals. Neuroscience & Biobehavioral Reviews, 111, 149–165. https://doi.org/10.1016/j.neubiorev.2020.01.020 
• Prochazkova, E., & Kret, M. E. (2017). Connecting minds and sharing emotions through mimicry: A neurocognitive model of emotional contagion. Neuroscience & Biobehavioral  Reviews, 80, 99–114. https://doi.org/10.1016/j.neubiorev.2017.05.013 
• Zhu, T., Bi, J., Wang, L., Xin, Z., Jin, L., Zhou, Y., Lu, K., Wang, X., Hao, N., & Wang,  Y. (2025). Your smiles inspired my smiles: The interpersonal neural coupling of positive emotion contagion during social interactions. NeuroImage, 320, 121462.  https://doi.org/10.1016/j.neuroimage.2025.121462