Event when one person first encounters another person and forms a mental image of that person
In psychology, a first impression is the event when one person first encounters another person and forms a mental image of that person. Impression accuracy varies depending on the observer and the target (person, object, scene, etc.) being observed. First impressions are based on a wide range of characteristics: age, race, culture, language, gender, physical appearance, accent, posture, voice, num... Wikipedia