Sources: 1. https://link.springer.com/chapter/10.1007/978-3-319-19102-7_6 2. https://www.verywellmind.com/differences-between-extrinsic-and-intrinsic-motivation-2795384 3. https://www.verywellmind.com/what-is-the-overjustification-effect-2795386
