1. Keppel G (1991) Design and analysis: a researcher’s handbook, 3rd edn. Prentice-Hall, Inc, Englewood Cliffs
2. Kirk RE (2003) Experimental design. In: Handbook of Psychology, John Wiley & Sons, Hoboken, pp 3–32
3. Abbuhl R, Gass S, Mackey A (2013) Experimental research design. In: Podesva RJ, Sharma D (eds) Research methods in linguistics. Cambridge University Press, Cambridge, pp 116–134
4. Shadish WR, Cook TD, Campbell DT (2001) Experimental and quasi-experimental designs for generalized causal inference. Houghton Mifflin, Boston
5. Cohen J (1992) Things I have learned (so far). In: Kazdin AE (ed) Methodological issues & strategies in clinical research. American Psychological Association, Washington, pp 315–333