173 



1.- H. Ebbinghaus. "Grundzuge der Pschologic 

 Sweite Auflage", p. 657. 



2.- ./. H. Pyle. "Economic Learning", "The 

 Journal of Educational Psychology" Liar. 1913, Vol. IV, 



3.- Vinnie 0. Hicks and H. A. Oarr. "The 

 Journal of Animal Behavior" Vol.II.IJo.2. 



A .- J. Dewey. As quoted by E. N. Henderson 

 in "Principles of Education", p. 101 



5.- I. I. Hobhouse. "Mind in Evolution" London. 1901 



6.- 0. S. Sherrington. "The Integrative Action 

 of the Nervous System". 1907 p. 114 



7.- 87. B. Gannon. "Journal of Physiology". 1911 



