APPRECIATION OF INTELLIGENCE 



29 



who presented any easily noticeable defect was carefully 

 examined for the presence of other defects, while those who 

 presented none of the more prominent defects were passed 

 over without further examination. These considerations 

 naturally lead us to ask what is the association between 

 mental capacity and the state of nutrition, the test case 

 selected by Mr. Yule, among those children who were more 

 carefully examined? Now Mr. Yule, in his original discussion 

 of Dr. Warner's data, has given the Coefficients of Association 

 between Mental Dullness and Low Nutrition in cases where 

 the children have either developmental defects or nerve de- 

 fects or both. These Coefficients of Association, however, 

 give too high values, and therefore I have given in Table IV 

 the Correlation Coefficients between Mental Dullness and 

 Low Nutrition in cases where other defects are present. 



TABLE IV. THE CORRELATION BETWEEN MENTAL DULLNESS 



AND LOW NUTRITION AMONG CHILDREN SUFFERING 



FROM OTHER DEFECTS. 



The actual values given above are all small, however ; 

 they are in fact of the same order as the correlation coeffi- 

 cients given in the Galton Memoir. We see then that so far 

 as the cJdldren for whom schedules were filled np arc con- 

 cerned, the only children on whom any real examination was 

 made, Dr. Warner's material shows hardly any relationship 



