PROBLEM OF NURTURE AND NATURE 55 



TABLE VIII. 



Inter correlation of Physical and Parental Environmental Factors. 

 Rochdale and Blackburn. 



Indirect parental environmental factor and 



physical environmental factor Rochdale Blackburn 



Insufficiency of food and number of rooms ... ... -49 



,, ,, rent ... ... .-.. ... -48 



,, ,, ,, overcrowding ... ... ... -39 



Occupation of father and number of rooms ... ... -50 



Regularity of father's work and number of rooms . . . -48 



Father's occupation and overcrowding ... ... ... -45 



Means of family and overcrowding ... ... ... ... -58 



Father's occupation and type of house ... ... ... -56 



Means of family and type of house ... ... ... ... -58 



Income of family and type of house ... ... ... -67 



,, ,, overcrowding ... ... ... -52 



,, lighting" ... ... ... ... -46 



,, ,, possibility of ventilation ... ... -58 



Employment of mother and type of house ... ... -58 



,, number of rooms ... ... -45 



,, ,, possibility of ventilation ... -53 



lighting -31 



,, ,, overcrowding ... ... 'iy 



Father's wage and overcrowding -12 



Mean correlation ... ... *468 



We now turn to the Direct Parental Environmental Factors which 

 form a very closely correlated group. 



TABLE IX. 



Intercorrelations of Direct Parental Environmental Factors. 

 Rochdale and Bradford. 



* Bradford Rochdale 



Health of mother and habits of mother '5 2 



habits of father '49 



Habits of mother and cleanliness of home *79 



-63 



use of ventilation '59 



;; -69 



Health of mother and cleanliness of home ... '45 



use of ventilation ... ... ... '3 



Mean correlation '568 



Thus the direct parental factors of environment, which we know 

 in the case of health and suspect in the case of habits to be largely 

 hereditary have an intercorrelation of the order -6. 



