i believe the difference in the level of intelligence might be a barrier to communication. Some people may presume that he/she is wiser than the rest . He/she would not interact with others.
Our perceptions are the way we see things. Events, people and the world around us. People from different backgrounds have different viewpoints and this causes communication problems. Examples of perceptual barriers are: Background, Education and training, Intelligence, occupation, Needs, interests, personality, attitude, age, sex and religion.