According to Fredrickson, happiness that encompasses feeling good and doing good is defined as what?

The concept of happiness that includes both feeling good and doing good is best defined as flourishing. Flourishing refers to a state of optimal well-being, where individuals experience positive emotions, psychological well-being, and a sense of purpose or meaning in life. This holistic view emphasizes not just the absence of negative experiences but also the presence of positive ones, encouraging a balance between personal satisfaction and contributing positively to society.

In contrast, the other terms represent different aspects of well-being but do not encompass the full spectrum of flourishing. Positivity often refers to a general inclination toward positive emotions, while mindfulness is about being present and aware without judgment. The term "positivity core" is less commonly recognized in the literature and does not have a defined meaning tied to well-being in the same comprehensive way that flourishing does. Thus, flourishing is the most accurate term to encapsulate the idea of happiness that integrates both personal fulfillment and altruistic action.