vii 



circles of readers outside the psychological profes- 

 sion, especially to teachers of normal and of back- 

 ward children, to school administrative authorities, 

 to school physicians, to specialists in nervous and in 

 children's diseases, and to those engaged in child 

 welfare work. This special edition, accordingly, has 

 been arranged. I hope that it will demonstrate to 

 the workers in these circles the great importance and 

 fruitfulness of the psychologist's methods and at the 

 same time show them the difficulties and the gaps in 

 the present status of this work, and that so plainly 

 as to prevent overhasty attempts at practical appli- 

 cation. 



W. STERN. 

 Breslau, October, 1912. 



