A study found that proofreading had a larger correlation with general knowledge than with general intelligence, verbal reasoning, or openness to experience. In a multiple regression analysis using general knowledge, general intelligence, verbal reasoning, five factor personality traits, and learning styles as predictors, only general knowledge was a significant predictor. General knowledge has been found to have weak associations with measures of creativity. In a study examining contributions of personality and intelligence to creativity, general knowledge was positively correlated with tests of divergent thinking, but was unrelated to a biographical measure of creative achievement, self-rated creativity, or a composite measure of creativity. The relationship between general knowledge and divergent thinking became non-significant when controlling for fluid intelligence. Many game shows use general knowledge questions for entertainment purpose. Game shows such as "Who Wants to Be a Millionaire?" and "Fifteen to One" centre their questions on general knowledge, while other shows focus questions more on specific subjects. Some shows ask questions both on specific subjects and on general knowledge, including "Eggheads" and ""Mastermind"". In "Mastermind", contestants choose their own "specialist subject" before answering general knowledge questions, whereas in "Eggheads" the subjects are chosen at random.