The broaden-and-build theory in positive psychology gave a whole new perspective about positive emotions. The broaden-and-build model states that the function of positive emotions is to extend the scope of attention and foster the construction of resources.
It studies how positive emotions makes us free to be creative, playful, curious etc., and how these behaviors brings opportunities to get new physical, social, and intellectual resources.
An example is the emotion of joy in young kids brings about more play.
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