K. Pearson 
127 
group were put first with the quick and then with the sullen, and the slow intelli- 
gent first with the intelligent and then with the slow. 
Girls' temper and intelligence. 
Correlation Coefficients (</) "162 
{b) -304 
(c) -140 
(d) -279 
Mean Square Contingency = ■192. 
Thus while the variation in the correlation coefficient shows tliat the distribu- 
tion is not normal, the mean of several fourfold tables gives a result of the same 
order as, indeed, within the limits of the probable errors, equal to that of mean 
square contingency. 
This is, however, rather an extreme example of variation. Take the following 
as better illustrations of the double grouping of the slow intelligent : 
Boys' Intelligence and Conscientiousness. 
Fourfold Talile : Correlation Coefficient («) -464. 
(6) -463. 
Boys' Intelligence and Popularity. 
Fourfold Table : Correlation Coefficient (a) -233. 
(b) -220. 
Thus we have, I think, reached a reasonably close approximation to the 
intensity of the relationship between the characters dealt with. It is not con- 
tended that the numbers obtained are anything more than a first scale of the 
relationship between intelligence and the other mental and physical characters. 
But the general accordance between the results for boys and girls is, even so, remark- 
able, and the whole series in Table XI may serve as a guide for more complete 
TABLE XI. 
Oil the Correlation of Ability with Various Mental and Physical Characters. 
Character 
Mean 
(Both sexes) 
Boys 
Girls 
Conscientiousness ... 
•45 
•4G 
•43 
Handwriting ... 
•29 
•28 
•30 
Popularity 
•2G 
•22 
•30 
Athletic Power 
•22 
•20 
•24 
Temper 
•21 
•19 
•22 
Health 
•18 
•17 
•19 
Head Length .. 
•1 1 
•14 
•08 
Head Breadth 
■11 
•11 
•11 
Hair Colour ... 
•10 
•10 
•09 
Shyness 
•10 
•03 
•18 
Self-Consciousness ... 
•07 
•10 
•03 
Eye Colour ... 
•07 
•08 
•06 
Head Height 
•06 
•07 
•05 
, Age 
•OG 
•0.5 
•08 
i Quiet Habits 
•OG 
•04 
•09 
Hair Set 
•OG 
•04 
•09 
Cephalic Index 
- -04 
•07 
