A study performed in June 2008 revealed that perception is closely correlated with performance. Nine different sized black circles were glued onto a white background. After a round of golf, forty-six golfers were asked which black circle was the size of the hole on the putting greens. The players with the overall better scores perceived the hole to be bigger than it actually is, so they chose the bigger black circles. The players with the worse scores perceived the hole as being smaller than it actually is.