Julius was obese and repeatedly failed in his attempts to lose weight,even when his uncle offered him monetary and material rewards.After college,he finally succeeded at getting into better shape.He explained that this time he wanted to do it for himself.According to self-determination theory,the main factor in Julius's success was intrinsic rather than extrinsic motivation.

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According to self-determination theory, intrinsic motivation (doing something for personal satisfaction or enjoyment) is a stronger predictor of success than extrinsic motivation (doing something for external rewards or pressures). In this case, Julius's success was attributed to his desire to do it for himself, which is an example of intrinsic motivation.

Julius Was Obese and Repeatedly Failed in His Attempts to Lose