The Chameleon Effect: How Unconscious Mimicry Builds Rapport and Influence

In the late 90s, professors Tanya Chartrand and John Bargh ran a study with psychology undergrads at NYU. The goal was to answer a simple question: does copying someone without knowing it really happen, and if so, why do we do it and what’s the value?

Chartrand and Bargh set up three studies.

1. Unconscious Mimicry

Participants sat in a room with someone they thought was another participant. In reality, that person was planted there by the research team, rubbing their face or shaking their foot fairly frequently throughout the conversation. Researchers later watched the video footage and counted how often the real participant did the same thing.

The finding: people rubbed their face more when paired with a “face rubber,” and shook their feet more when paired with a “foot shaker.”

2. Unconscious Mimicry and Liking

This time, the research assistants were instructed to either mimic the real participant’s mannerisms and posture, or not. Participants who had been mimicked rated the interaction as smoother and liked the other person more, even though they couldn’t explain why.

3. Perspective Taking

Same task as studies 1 and 2, except this time the assistant rubbed their face and shook their foot the entire time. Afterward, participants filled out a questionnaire measuring two types of empathy:

• Perspective-taking: thinking your way into someone else’s shoes
• Empathic concern: feeling for someone in their situation

People who were better at thinking their way into someone else’s shoes mimicked more. People who felt more emotionally didn’t mimic any more than anyone else.

So mimicry isn’t about how much you feel for someone. It’s about how closely you’re paying attention to them.

With far less in-person interaction today, the natural cues we’d normally pick up on and mirror don’t show up the same way online. Being intentional about it in virtual settings helps you build rapport faster.

Liking is one of the oldest, most reliable levers in influence. People say yes to people they like, and that liking isn’t built through clever words, it’s built through unconscious physical syncing. If your work involves persuasion, sales, leadership, or negotiation, that matters. The fastest way to build trust isn’t a better pitch, it’s paying closer attention to the person in front of you.

3 Actions to Take:

1. Stop rehearsing your next line and actually watch the other person. Mimic their posture, energy and behaviours intentionally.  
2. Match pace and tone in high-stakes conversations. If someone’s speaking slowly, don’t rush them. Meeting their rhythm builds rapport faster than any script.
3. On video calls, compensate on purpose. Screens kill natural mimicry cues, so lean in, nod, and mirror energy deliberately.