In social interactions, people must pay attention to many behavioral events unfolding in themselves and the other person-events that can be observable or unobservable, intentional or unintentional. Three studies explored how people distribute their attention to these different event types and, as a result, build up representations of self and partner during the interaction. Relying on basic principles of attention , the authors predict 2 actor-observer gaps: Actors pay more attention to unobservable events and less to observable events than observers; and actors pay more attention to unintentional events and less to intentional events than observers. Study 1 documents both gaps. Studies 2 and 3 explore factors that might close the gaps, such as relational intimacy and empathy. Implications of these results for the role of attention in attribution and interpersonal behavior are discussed. The paramount fact about human interactions is that they are happenings that are psychologically represented in each of the participants.. . We interact with each other. .. via emotions and thoughts that are capable of taking into account the emotions and thoughts of others (Asch, 1952, p. 142). Generally, a person reacts to what he thinks the other person is perceiving, feeling, and thinking, in addition to what the other person may be doing (Heider, 1958, p. 1).