References

America OnLine:DarkHart91. Ivan Pavlov

Branca, A.A. (1968). Psychology: The Science of Behavior. Boston, MA: Allyn and Bacon, Inc.

Coon, D. (1980). Introduction to Psychology. (7th ed.). St. Paul, MN: West Publishing Company.

Crider, A.B., et al. (1986). Psychology. (2nd ed.). London, England: Scott, Foresman and Company.

Hilgard, E.R., Atkinson, R.L., Atkinson, R.C. (1979). Introductionto Psychology (7th ed.). New York, NY: Harcourt Brace Jovanovich, Inc.

Kendler, H.H. (1968). Basic Psychology (2nd ed.). NewYork, NY: Meredith Publishing Company.

Nettler, S.E. (1978). The Effects of Stimulus Change andDifferentiability of Warning and Safe Periods on Discrete-Trial and Safe Periodson Discrete-Trial Lever-Press Avoidance. Master's Thesis for Masters inPsychology at Cortland College: State University Of New York.

Sidowski, J. (1989). Conditioning, Cognition, and Methodology.Lanham, NY: University Press of America Inc.