IQ vs. self-discipline

Dave Munger (in Cognitive Daily, a blog reviewing psychology articles) reports on the findings of Angela Duckworth and Martin Seligman. They found that self-discipline was a better indicator of school performance for 8th graders than IQ: Self-discipline had a .67 correlation with GPA while IQ had only a .32 correlation. In addition, there was no correlation between IQ and self-discipline. This makes sense. Anderson and Schunn (2000) assert that there are no magic bullets in learning, but rather the most important factor is effective time on task. Munger wonders,

Perhaps the most important question which remains is how best to teach children self-discipline — or whether it can be taught at all.

I wonder how self-discipline is related to self-determination (i.e., autonomy, competence, and relatedness).