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 



