When different forms of stealing are arranged according to the aggressiveness involved in their execution, the median chronological age is seen to be higher for each successive group, from that of 13 years 1 month for stealing in the home, to 17 years 8 months for forgery. When the various types of stealing are arranged according to the degree of mental maturity, they follow a serial order according to the amount of planning and forethought required to carry each form of theft into effect. When the several forms of theft are arranged according to the degree of their intelligence quotients, a well-defined grouping is brought out. Children who steal from the home and stores, who take bicycles and automobiles on the streets, who burglarize and commit highway robbery, range from about 72 to 79 I.Q. Those who rob freight cars and slot machines are much lower in intelligence, about 50-60 I.Q., while children who use forgery as their means of theft are of normal intelligence. (PsycINFO Database Record (c) 2006 APA, all rights reserved)