A crucial component is the idea of intermittent reinforcement, which is a psychological theory in which rewards are given irregularly as opposed to regularly. Because players never know when they might hit a wrummy 41inning combination, this unpredictability breeds excitement and anticipation in them. Despite past setbacks, players are motivated to keep playing because of the excitement of possibly winning large sums of money. Players who come close to winning feel inspired to keep trying, a phenomenon known as the "near-miss effect.". Also, a large part of player behavior is influenced by the design features of slot machines.