According to Heider (1958), people are naive Scientists whore late observable behaviour to unobservable causes. We produce attributions, which are beliefs about the reasons why other people behave as they do. Heider argued that there is a key distinction between internal attributions (based on something within the individual being observed) and external attributions (based on something outside the individual). Internal attributions are called dispositional attributions, whereas external attributions are called situational attributions. A dispositional attribution is made when we decide that someone's behavior is due to their personality or other characteristics. In contrast, a situational attribution is made when someone's behavior is attributions to the current situation.