The feel-good, do-good phenomenon refers to the fact that when people feel happy, they "are more willing to help others."
This is based on the feel-good, do-good phenomenon used or established by Martin Seligman in his PERMA model.
Martin Seligman is an American Psychologist whose PERMA model tried to understand human happiness and wellbeing.
The PERMA model stands for Positive Emotion, Engagement, Relationships, Meaning, and Accomplishments.
Hence, in this case, it is concluded that humans tend to help others or do good things when happy.
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