Does anyone else see the tautology here? Consider this quote:<p><i>>specific and challenging goals led to higher performance than easy goals, "do your best" goals, or no goals.</i><p>Note the word "performance". If performance is defined as "achieved certain goals", then this statement reduces to a tautology. Or rather, I'd say that the study (subtly) assumes it's conclusion.<p>I realize that the author intended the sense of these two words to be different. Perhaps a more careful replacement for the word goal would be "training exercise", and then "performance" would be some sort of standardized test. But even so, the statement still devolves into something that while not a tautology is hardly earth-shattering: "if you practice doing something you'll get better at it."<p>(As I understand it, Dan's original point is simply that it's easy to get frustrated if you bite off more than you can chew - so content yourself with learning simpler things at first. I agree with that and I'll defend it.)