When a fat man looks depressed, others think he is hungry. ". The concept that best illustrates this phenomenon is. ['Social Focus Effect: A tendency for a person to overestimate the attention of people around him to his appearance and behavior.', 'Self-transparency illusion: a tendency for people to overestimate how much their personal mental state is known to others.', 'Bystander effect: when an individual is facing an emergency, the presence of others will inhibit the occurrence of altruistic behavior.', 'Self-proven prophecy: If people believe something will happen, it will eventually happen.']