An outcome orientation - where "what matters" is the outcome, i.e. whether you win or lose or achieve a certain target - is presumably contrasted with something like a process orientation, where the focus is on the way you play or perform. For example, a highjumper with an outcome orientation will be concentrating on clearing the bar at a particular height (or winning the competition), whereas someone with a process orientation will be thinking more about the details of their style and performance (and could be happy with the outcome even if they lose if they feel that they actually performed very well).