Explanations of answers come from the ABA Bible: Cooper, J. O., Heron, T. E., & Heward, W. L. (2007). Applied behavior analysis, 2nd ed. Upper Saddle River, N.J.: Pearson Prentice Hall. I did not cite his book on each question so please understand each question refers to the Cooper book listed above.

Definitions and strengths&weaknesses of experimental designs

AQA AS and A Level Research Methods: Includes experimental methods, control of variables, experimental design, and types of experiment.