[organizational behavior] a shortcut of decision making in which favorite option already in mind will dominate the decision making process.
eg: If we suspect Sean of poor performance, we will watch him closely and find evidence that he is really a poor performer; but in fact, we don't watch him every minute and are not willing to find the disconfirming evidence due to bias. Maybe that poor performance was a just a one-off, and Sean is actually a good performer.