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This book gives an observational study of the frequency, duration, causes and methods of handling outbursts of anger in young children in the home. Based as it is on daily reports made by a group of mothers, it may be questioned because of the possible prejudice or lack of objectivity. The reports on the children's behavior were not checked by a second observer. The author is well aware of this disadvantage and has attempted to make the reports as reliable as possible by care in the construction of the daily record sheets and by choosing mothers whose education was superior to the average. Unfortunately the group included only forty-five children, who ranged in age from 7 months to almost 8 years. Thus when divisions were made on the basis of age, sex and the like, the subgroups were extremely small. In view of the small numbers and the uncertain reliability