You meet someone briefly at a party and your first impression is very unfavorable so you come away not liking that person. A few months later that same person is taking the same psychology class with you, and two of you get assigned to work together on a project. As a result of getting thrown together you discover that you actually have a lot in common and you become friends. Your feelings about this individual change dramatically as you find out that you actually like this person quite a bit. This is an example of-