152 PSYCHOLOGICAL METHODS OP TESTING INTELLIGENCE 



77. F. Krueger und C. Spearman. Die Korrelation zwischen 

 verschiedenen geistigen Leistungsfahigkeiten. ZPs, 44: 1906, 50- 

 114. 



78. G. Ries. Beitrag zur Methodik der Intelligenzprufung. 

 ZPs, 56 : 1910, 321-343. 



79. C. Spearrnan. The proof and measurement of association 

 between two things. AmJPs, 15 : 1904, 72-101. 



80. C. Spearman. 'General Intelligence' objectively determined 

 and measured. AmJPs, 15 : 1904, 201-292. 



*81. H. Waite. The teacher's estimation of the general intelli- 

 gence of school children. Biometrika, 8 : 1911, 79-93. 



Note : Heft 5/6 of ZAngPs, Vol. 6, which contains the articles of 

 Bobertag (40, II), Chotzen (44) and Block u. Preiss (38), can also 

 be purchased separately through book sellers. 



