AS THE BIOLOGIST SEES IT 



by a large amount of similar investigation, 

 especially those of Goddard. 



Williams finds that about one-third 

 of his juvenile delinquents are feeble- 

 minded and that nearly one-half are 

 border line or dull-normal in mental 

 rating, while only about one-fifth are 

 average-normal or superior. If the per- 

 centage of the various mental rating 

 classes in two groups of California boys 

 of similar ages are compared, one group 

 being Williams' 470 delinquents and the 

 other a group of one thousand boys taken 

 at random from all classes of the popula- 

 tion, we note the following suggestive 

 facts: Superior rating, delinquent group, 

 3%, miscellaneous group, 20%; average- 

 normal rating, delinquent group, 19%, 

 miscellaneous, 60%; dull-normal rating, 

 delinquent, 21%, miscellaneous, 10%; 

 border-line rating, delinquent, 27%, mis- 

 cellaneous, 8%; feeble-minded, delin- 

 quent, 30%, miscellaneous, 2%. The 

 association of feeble-mindedness with ju- 

 venile delinquency is positive. 

 83 



