THE METHOD OF AGE GRADATION 31 



tions in the near future that it will hardly be recog- 

 nized in the end. But we know that we are on the 

 right track, and in some future decades it can be fully 

 appreciated what praise Binet and his co-worker 

 Simon have deserved by directing us along this path. 



A short time ago October 18, 1911 the gifted 

 and highly esteemed creator of the method died. His 

 all-too-early demise, that we mourn most bitterly, 

 compels others now to pick up the threads that he 

 had spun. At such a moment it is appropriate to 

 summarize briefly what has been gained and to point 

 out the steps that are to be taken for further ad- 

 vance. 



After many years of preliminary empirical inves- 

 tigation to determine what tests might be considered 

 normal for given ages, Binet and Simon published 

 (33) in the year 1908, the first complete account of 

 their system or tests. It comprised a series of from 

 five to seven tests for each age from three to thirteen 

 years. A revised draft appeared in 1911 (35, 36) in 

 which many tests are modified, many shifted to dif- 

 ferent age-years and the number of tests for each 

 age-grade brought uniformly to five. The 1911 sys- 

 tem replaces tests for 11, 12 and 13-year-olds by 

 tests for 13 and 15-year-olds and adults. 



A list of all the investigations conducted on the 

 B. S. tests to date is given in the bibliography at the 

 end. In the appendix there are brought together in 

 comparative form the series of tests proposed for 

 each age by Binet and Simon in 1908, and 1911, by 

 Bobertag, and by Terinan and Childs. 



As a glance at the list of tests shows, almost all of 

 them are of the alternative type, i. e., they are tests 



