A 1955 survey of the effects of television on 10 to 14 year-old children in Great Britain is reported. A discussion of the problem investigated is presented first--the impact of television on children. Next a summary of the main findings is offered detailing the amount children view and the way in which different children react to television. A set of principles and generalizations are then derived covering principles of leisure displacement, principles underlying television's effects on children's outlook and values, generalizations about taste, and the principles which determine what types of incidents arouse fear and emotional disturbance. A final section discusses implications of the study and makes suggestions to the general public, parents, teachers, and youth club leaders about uses of television. (This pamphlet is a reprint of the first four chapters of the original report of the study which is now out of print.) (SH)