Angela Duckworth in her book Grit (2016) defines grit as a personal characteristic, which has two components: passion and perseverance. She builds on different performance theories and the work of various researchers. The construct of grit emphasizes the importance of effort as essential for success. While Duckworth provides some empirical support for her claims, she makes her claims vaguely. She does not take into consideration the importance of emotional intelligence, and she focuses only on a growth mindset.

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