Many descriptive studies of child behavior were carried on in the 192o's and the 1930's. Since that time the environment of young children has changed greatly, and the results of recent but comparable studies of behavior are both similar to and different from those carried on 20o or more years ago. Since the range of children's information should be particularly sensitive to the differential impact of a changed environment, the author repeated in 1954-1955 the study carried on by Probst in 1928 with kindergarten children (2, 3)PROCEDURE Sample In the present study the number, sex, age and socioeconomic distribution of the subjects in the major sample are the same as in the Probst study. Both studies included ioo children, 50 boys and 50 girls between five years, four months, and six years, chosen to be representative of the total population of Minneapolis according to their father's occupations as classified on the Minnesota Scale of Paternal Occupations. In both studies the 50 children in classes I, II, and III (professional, semi-professional and managerial, clerical and skilled trades) constituted the upper socioeconomic group, and the 50 in classes V, VI, and VII (minor clerical jobs, semi-skilled trades, slightly skilled and unskilled labor), the lower socioeconomic status group. Probst's subjects were selected from seven Minneapolis Public schools and those in this study from II such schools in neighborhoods appropriate to their fathers' occupations. Although Probst had Detroit Intelligence Test scores available, in the present study no such data were available and no intelligence test was given. An indirect control of intelligence is achieved in the selection of the sample. The children in this study were questioned during their first semester in kindergarten. Since Probst questioned her subjects during the second