TRANSLATOR'S PREFACE 



This translation of Stern's Die psychologischen 

 Methoden der Intelligenzprufung has been under- 

 taken because the monograph, though dealing with a 

 different topic, aims, like my previous translation of 

 Offner's Mental Fatigue, to collate, systematize and 

 appraise a mass of scattered and to most readers in- 

 accessible material that bears upon a problem of un- 

 questioned importance. 



Professor Stern was one of the pioneers and most 

 active expositors of the investigation of the psychol- 

 ogy of testimony, for the furtherance of which he in- 

 stituted a new periodical, Beitrdge zur Psychologie 

 der Aussage, which W.MS later enlarged to cover the 

 wider field of applied psychology in general (Zeit- 

 schrifi fur angewandte Psychologie). Stern is like- 

 wise well-known for his contributions to individual 

 psychology, notably for his important work on indi- 

 vidual differences ( Ueber Psychologie der individuel- 

 len Differ enzen), published originally in 1900 and 

 completely rewritten in 1911 under the title, Die dif- 

 ferentielle Psychologie, and for his numerous sig- 

 nificant contributions to the psychology of childhood. 

 From his Psychological Seminary at Breslau have 

 appeared many researches, some of which are re- 



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