THE ASSOCIATIVE PROCESSES OF THE GUINEA 

 PIG. A STUDY OF THE PSYCHICAL DEVEL- 

 OPMENT OF AN ANIMAL WITH A NERVOUS 

 SYSTEM WELL MEDULLATED AT BIRTH. 



By Jessie Allen. 



CONTENTS.. 



Introduction. Review ot literature. Problem of the work. . . 294 



Part I. Thk Associative Processes ok the Guinea Pic. . . 300 



/. Habits of Guinea Pigs. ....... yx) 



J I. Characteristics of the Developing Guinea Pig. . . . 306 



A. Description of the young guinea pig at birth. . . 306 

 Test I. Is the mother a specific stimulus for her young? 306 



B. Experimental work. ....... 309 



Introduction. ........ 309 



Test II. Recalling a simple path. .... 311 



Test III. Alteration in habit. ..... 312 



Test IV. Does the odor of the previous path furnish the 



stimulus? . . . . . . . . 314 



Test V. Complexity of associations. . . . 315 



C. Summary of work with young. . . . . . 317 



///. ' Ex fer intents with the Adult. . . . . . . 317 



Test VI. Preliminary. . . . . . . . 319 



Test VII. Distinction of stimuli. . . . . . 321 



Test VIII. Learning a labyrinth. ..... 323 



Conclusions from the labyrinth experiment. . . . 327 



Test IX. Learning without the aid of vision. . . . 327 



Conclusions from the four tests. ..... 330 



Test X. Preference for the dark. ..... 332 



Test XI. Means of orientation. ..... 333 



Test XII. Efficiency of contact stimuli for following a path. 334 



Conclusions from Tests X, XI and XII. .... 337 



Summary of work with adult. ..... 337 



//'. 77/e Dcvelopineitt of the Guinea Pig Compared with that of the 



White Rat 338 



/'. The Psychic Life of the Guinea Pig Compared 7ciith that of the 



IVhite Pat. ......... 339 



[ I] 



