Mark has formed an impression of juan by watching how he acts toward others during basketball practice and at school. mark has formed a(n) attribution in thinking of juan as being a team player and nice to others, regardless of the situation.

Dispositional attribution.

Explanation:

Mark has formed a dispositional attribution in thinking of Juan as being a team player and nice to others, regardless of the situation. Dispositional attribution is the tendency of assigning to someone's internal characteristics the cause of behaviors or actions. Among internal characteristics, there are someone's values, beliefs, and personality. Mark is attributing Juan's behavior to inner characteristics, or disposition.