Internalisation: we take on the majority view because we accept it as correct. It leads to a far-reaching and permanent change in behaviour, even when the group is absent.
Identification: we act in the same way as the group because we value it and want to be part of it. We don't necessarily agree with everything the majority believes.
Compliance: temporary type of conformity where we outwardly go along with the majority view, but privately disagree with it. The change in behaviour lasts as long as the group is with us.