Seriousness is an attitude of gravity, solemnity, persistence, and earnestness toward something considered to be of importance. Some notable philosophers and commentators have criticised excessive seriousness, while others have praised it. Seriousness is often contrasted with comedy, as in the seriocomedy. In the theory of humor, one must have a sense of humor and a sense of seriousness to distinguish what is supposed to be taken literally or not, or of being important or not. Otherwise, it may also be contrasted with a sense of play. How children learn a sense of seriousness to form values and differentiate between the serious and that which is not is studied in developmental psychology and educational psychology. There is a distinction between the degree of seriousness of various crimes in sentencing under the law, and also in law enforcement. There is a positive correlation with the degree of seriousness of a crime and viewer ratings of news coverage. What is or is not considered serious varies widely with different cultures.