When he tees off Thursday afternoon at the Masters, Tiger Woods
will be conducting an experiment that may help answer one of the
few unexplored questions in sports: Can one of the world's
greatest athletes change his temperament and still win?  For
more than a decade, Tiger Woods has been the dominant golfer in
the world, winning 97 tournaments and more than $111 million in
prize money. But he also has been one of the angriest. Mr. Woods
has stalked through his rounds, eyes trained on the grass,
rarely speaking with playing partners.  When he has hit a shot
he doesn't like, he has tossed the club or slammed it against
the turf. He has screamed expletives and ignored 8-year-old
autograph seekers. He has glared at any photographer who has
dared to click a shot during his backswing or any fan who has
disrupted his rhythm.  Tiger Woods missing a birdie putt at last
year's PGA Championship. Getty Images  But as he starts his
comeback from a five-month layoff that included a 45-day stay at
a therapeutic-treatment f