[10.] How We Think, p. 79.
[11.] Thorndike, Educational Psychology, Briefer Course, p. 172.
[12.] Introduction to Psychology, p. 284.
[13.] Thorndike, Origin of Man, p. 146.
[14.] Racial Differences in Mental Traits, pp. 177 and 181.
[15.] Thorndike, Educational Psychology, Briefer Course, p. 374.
[16.] Thorndike, Educational Psychology, Vol. III, p. 304.
[17.] Moral Principles in Education, p. 17.
[18.] For a fuller discussion of this topic see next chapter.
[19.] For a discussion of these scales see Chapter XV.