Skill = Speed × Accuracy × Form × Adaptability

Bloom B. S. , (Ed.) Taxonomy of educational objectives. New York: Longmans, Green, 1956.

Ghiselli E. , & Brown C. W. Personnel and industrial psychology. New York: McGraw-Hill, 1955.

Harrell T. W. Industrial psychology. (Rev. ed.) New York: Rinehart, 1958.

Johnson H. W. A way to use reading pacers. In Causey O. S. & Eller W. (Eds.), Starting and improving college reading programs. Eighth Yearbook of the National Reading Conference. Fort Worth, Tex.: Texas Christian Univer. Press, 1959.

Krech D. , & Crutchfield R. S. Elements of psychology. New York: Knopf, 1958.

Maier N. R. F. Psychology in industry: a psychological approach to industrial problems. (2d ed.) Boston: Houghton Mifflin, 1955.

Tiffin J. , & McCormick E. J. Industrial psychology. (4th ed.) New York: Prentice-Hall, 1958.

Tyler R. W. Constructing achievement tests. Columbus: Ohio State Univer., 1934.

Vandermeer A. W. The economy of time in industrial training: an experimental study of the use of sound films in the training of engine lathe operators. J. educ. Psychol., 1945, 36, 65–90.

Walton A. The fundamentals of industrial psychology. (2nd ed.) New York: McGraw-Hill, 1941.