REFERENCES

Edward L. Thorndike, in Chapter I of his Educational Psychology, Briefer Course, 1914, gives a general survey of the native factors in mental life and behavior.

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Hollingworth and Poffenberger, in their Applied Psychology, 1917, devote Chapters II and III to the matter of mental heredity.

Norsworthy and Whitley, in their Psychology of Childhood, devote Chapters I and II to "original nature".

C. B. Davenport, in his Heredity and Eugenics, presents evidence of the importance of heredity in determining mental and moral traits.

Yerkes and Bloomfleld, in a short article in the Psychological Bulletin for 1910, Vol. 7, pp. 253-263, under the title, "Do Kittens Instinctively Kill Mice?", furnish a good illustration of the method employed in distinguishing native from acquired reactions.

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CHAPTER VI
INSTINCT