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Animal 
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By JOHN B. WATSON, Pu.D. 
number of the medullated fibers in the co 
AN EXPERIMENTAL 
STUDY ON THE 
PS ¥ C3 it ss 
DEVELOPMENT 
NERVOUS SYSTEM 
rHis stupy is largely supplemental to that of Flechsig and attempts to throw some 
ht upon the following questi 1) How far is it possible to give a systematic 
count of the gradual unfolding of the associative processes in the rat? (2) 181 
t 
a conditio sine gua non of the rat’s forming and retaining definite associations? (3) | 
here any connection between the inc creasing complexity of the psyc chical life and the 
ortex, together with their extension toward its 
122 pp., with numerous text- figures and plates, 
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The 
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