We have here the report of one portion of a detailed and painstaking investigation carried on over a period of four years, while the author was engaged in child guidance work under the auspices of the Commonwealth Fund. This particular study centers in an investigation of behavior problems in a public school in Cleveland, in 1925-6, using as controls a study made in Minneapolis in 1924, and ratings obtained from the entire teaching staff of thirteen representative schools in six communities, from two groups of experienced teachers enrolled in advanced courses in two