Jordan Spieth, perhaps more than any current athlete, is a what behavioral scientists would classify as an external processor. When he wants to analyze a situation and determine precisely how he feels about something -- for example, a poor shot he just hit on the golf course -- it has to occur out loud.
And so, Spieth grumbles. He contemplates. He questions himself, recalculates and reassesses. Sometimes he is happy to share the feeling that what's just happened to his golf ball seems unfair. Sometimes he wants to justify a decision. Other times he is particularly hard on himself.