Jeong Hyeong-don, a broadcaster who had a rest with anxiety person with a disability, said that the Character structure changed 180 degrees after his debut in the entertainment industry. Psychologist kim kyung-il Professor appeared as a guest in KBS2 entertainment Problem Child in House' broadcasted last 10 days. On this day, Professor Kim said, "People who do not have a sudden change in Character structure are said to have developed well," he said. "I am well dressed in social clothes that can get along well with others. "I do not have anything to worry about," he said. In response, Jeong Hyeong-don said that his Character structure had changed. "In the old days, it was a really extroverted Character structure. It was similar to Noh Hong-cheol's level of extreme E." "When I was extroverted, I tried to meet a lot of people unconditionally. I couldn't stand being alone. But when I started working here, the Character structure completely changed to introvert (I)," Jeong Hyeong-don explained. Song Eun-yi asked, "Can Character structure or MBTI change?" Kim Professor affirmed, "There are people who change well." Professor Kim added, "MBTI shows what kind of social face I have lived in the past three to four years." Jeong Hyeong-don has said that he has suffered a panic person with a disability since 2005. He had a rest after getting off all the programs he was appearing on because of the anxiety person with a disability. While talking about whether food affects psychology, Lee Chan-won was surprised when he said, "I've never been eating alone or drinking alone since I was born. I'm a type who gets lonely a lot." "I feel very lonely and depressed when I have to eat alone," he confessed.