This is an extremely interesting sort order to me because of how psychologists say that intrinsic motivations are stronger and more likely to keep you going.

The result showed that: self-efficacy, intrinsic motivations the goals of task orientation, classroom context were positively correlated with the behavior of academic help-seeking.

The positive relationship still exits on the motivation and reading amount, which is dependent on the intrinsic and social motivations, self efficacy.