Implicit personality theory is a type of model people use to group various kinds of personality qualities together. Put in another way, implicit personality theories describe the way an observer uses the traits displayed by another person to form impressions about that other person. People pay attention to a variety of cues, including: visual, auditory, and verbal cues to predict and understand the personalities of others, in order to fill in the gap of the unknown information about a person, which assists with social interactions.