What you said seems correct to me. These articles may interest you:

https://journals.sagepub.com/doi/abs/10.1177/2041386614542889?journalCode=opra

http://www.wseas.us/e-library/conferences/2015/Seoul/MF/MF-22.pdf

Article Emotion Transfer, Emotion Regulation, and Empathy-Related Pr...

Dear Stephen Cheung

The article you mention help clarify the issues involved.

Thank you - warm regards Tina

Dear Edouard Giudicelli

It has taken me a while to fathom the nature of your question. Here is a definition of emotional contagion from one of the papers Stephen Cheung mentions:

"Emotional contagion has been defined as “the tendency to automatically mimic and synchronize expressions, vocalizations, postures and movements with those of another person’s and, consequently, to converge emotionally” (Hatfield et al)

Another way of saying this is mirroring - this can be deliberate or automatic. Often when one does it deliberately, it can lower emotional tension as the person feels heard. When this happens, the emotional quality of the situation is often reversed.

Let me give you an example: a friend of mine who is the person who admits emergency cases in a children's hospital. One evening a man came in and when he heard there was a long queue for the doctor, he got very cross. My friends, instead of saying you should not be cross, said: "I see you are cross and I can understand it - you are very concerned about the health of your child and having to wait to see the doctor is very difficult for you" . With this, the man started to cry ...his emotion has been mirrored and accepted with no judgment. This changed the atmosphere in the room, and all realized they were all under tension as they were all concerned about their children and it was OK - that is how things were at that moment.

Warm regards Tina