“This book is eminently worthy of the excellent series [‘Columbia university biological series’] to which it belongs, for it is the most detailed, accurate and complete description, analysis and interpretation of the behavior of lower organisms in existence. More than this, the work stands alone, the first representative of a class of books in which animal behavior is to receive thoroughly scientific treatment.”—J. Philos.
| Current Literature. 42: 217. F. ’07. 2090w. |
“By his researches Professor Jennings has made himself the authority on the behavior of unicellular organisms. His book is admirable with respect to material, method of presentation and form. Its future influence will certainly be tremendous, for it is a work which will determine the direction of research as well as mould popular and scientific opinion. It is the most important book on animal behavior that has ever been written.” Robert M. Yerkes.
| + + + | J. Philos. 3: 658. N. 22, ’06. 4800w. |
“Professor Jennings’s admirable presentation of the results of his observations in this most attractive field of study will appeal to the professionals and laymen. The style of the book is clear, straightforward, and convincing.”
| + + | Nation. 83: 424. N. 15, ’06. 840w. |
“From the standpoint of the contribution of facts, the book is exceedingly valuable. That portion of the book dealing with the analysis of behavior has a somewhat doubtful value because of its vagueness and complexity, and its constant allusions to pleasure and pain and to other physical processes in man. The final chapter dealing overtly with the relation of the behavior of lower organisms to psychic behavior should be undoubtedly greatly modified when the book comes to a second edition.” J. B. W.
| + + − | Psychol. Bull. 4: 228. S. 15, ’07. 1070w. |
“It would seem that Jennings in his enthusiasm for his own views had become blinded to the real strength of the tropism theory and not only was unable to accord it fair treatment, but also lacked appreciation of its real value. It is to be regretted that a book excellent in so many particulars should be marred by so considerable a defect.” G. H. P.