An analysis of Youth Centre interests was made by Hammond on 140 boys and girls of sixteen years. Sports and physical activities are the most popular. The data gave evidence of an athletic type and a more sedentary type preferring artistic and intellectual interests. The girls tended to belong to the latter type and the boys to the former.
Many other investigators have used the questionnaire method and there are many useful reports of studies undertaken on similar lines reported in the literature. I have referred only to three recent studies giving interesting results at three different age levels.
This general survey of the research work undertaken in the field of child psychology is perhaps sufficient to indicate to the general reader that a great amount of useful work has been done, and a great variety of method employed. The list of references at the end of this section will, I hope, tempt the serious students to read more as it is impossible to give detailed accounts within the scope of this volume.