Based on his studies of over 9,000 families, Murray A. Straus, the foremost researcher on family violence in the world, discusses the extent to which parents in the United States use corporal punishment (such as spanking and slapping) and its effects on their chil-dren. The question of whether corporal punishment is an effective method of discipline is hotly debated. Straus contends that this believed-to-be-"minor" form of physical violence is...