Positive Psychology
A great resource to begin your research, this video gives a brief, illustrated answer to the question, "What is Positive Psychology?"
Though a bit dated (2004), this TED talk is given by Martin Seligman, the founder of "Positive Psychology," who gives an in-depth presentation on the many facets and questions concerning this particular branch of psychology. As the video is conveniently broken up into chapters, the section titled, "Science of Positive Psychology" might be of most interest.
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