CONTENTS xiii 



PAGE 



(4) Reactions to External Agents depend on Physiological States . 286 



(5) The Physiological State may be changed by Progressive Internal 



Processes .......... 287 



(6) The Physiological State may be changed by the Action of 



External Agents ........ 287 



(7) The Physiological State may be changed by the Activity of the 



Organism .......... 288 



(8) External Agents cause Reaction by changing the Physiological 



State of the Organism 288 



(9) The Behavior of the Organism at any Moment depends upon its 



Physiological State at that Moment 288 



(10) Physiological States change in Accordance with Certain Laws . 289 



(11) Different Factors on which Behavior Depends .... 292 



CHAPTER XVII 



Analysis of Behavior (continued) 



B. The External Factors in Behavior 293 



(1) Relation to Physiological States 293 



(2) Change of Conditions as a Cause of Reaction .... 293 



(3) Reaction without External Change ...... 296 



(4) Reactions to Representative Stimuli ...... 296 



(5) Relation of Reaction to Internal Processes .... 298 



(6) Summary of the External Factors which produce or determine 



Reactions 299 



CHAPTER XVIII 



Analysis of Behavior (continued) 



2. The Nature of the Movements and Reactions 300 



A. The Action System 300 



B. Negative Reactions ........... 301 



C. Selection from the Conditions produced by Varied Movements . . . 302 



D. " Discrimination " 304 



E. Adaptiveness of Movements ......... 305 



F. Localization of Reactions .......... 306 



G. Positive Reactions 309 



3. Resume of the Fundamental Features of Behavior .312 



CHAPTER XIX 



Development of Behavior 314 



CHAPTER XX 



Relation of Behavior in Lower Organisms to Psychic Behavior . . . 328 



