emotional contagion

Emotions are contagious! Parents can catch strong emotions in their children alerting them to cues of their feelings without a word expressed. Parents catch a feeling from their child such as seeing fear or anger in a facial expression.
Those who lack empathy don't seem to "catch" yawns like the rest of us do.
The amount of access we're unknowingly granting to the seemingly innocent sites we visit on a daily basis is getting more and more invasive with no end in sight. How do we shield ourselves from this invisible line we didn't even know existed?
Emotions can be contagious, so you can potentially "catch" fear, anger or joy from people without realizing it. If you tend to be an emotional sponge, it's vital to know how to avoid taking on others' negative emotions.
Who you are is a function of whom you know. Your friends help shape your outlook, values, emotions and behaviors. Psychologists call this "social contagion," and it can work for or against you.
Ever noticed that you feel happy around happy people and sad around sad or depressed people? This is known as "emotional contagion" and is facilitated by an interconnected network of cells in the brain.