But one motivation stands out: "It's some sort of personal outlet or personal expression," he said.
Bush campaign officials denied such a motivation, pointing out that they have also reacted publicly when they believe that assessments of the president's standing are too rosy.
On the other hand, the company was more than happy to let me take the GEMS (Gait Enhancing and Motivation System) out for a spin.
Kobe asked Andrew for photos of NBA legends for motivation while out with injuries.
Motivation turns out to be an expensive way to compel behavior, particularly in a recession when there are fewer carrots to go around.
Economic studies on motivation crowding out include new and often more complex behaviors than the puzzles and tasks used in the cognitive evaluation theory literature.
Evidence from economic studies about motivation crowding out relies mostly on behaviors and tasks for which narrow self-interest must be traded off against benefits to others.
Motivation crowding out is said to occur when the incentive has an effect opposite of relative price effect, while the incentive is in place or afterwards.
You can be the motivation, think out loud with him/her about creative ideas to keep the mind wide awake.
But it was certainly draining all motivation out of him.
