Feeling happy isn’t just pleasant; it can also influence how other people react to you. How can you tap into the energy of your positive emotions to achieve what’s important to you?

Human beings are social creatures and, as such, we tend to notice each other’s moods. This goes further than simply being able to tell whether someone is happy or sad: we actually experience an unconscious echo of our companions’ emotions.

Mood on the job

This echoing is known as “emotional contagion,” and it can affect how people respond to us. In a 2011 study conducted in China, actors were hired to serve in a restaurant and were asked to follow either “positive” ...

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