Posted: September 14th, 2015

Disadvantage of blocking

Experimental Designs II

Read Jackson, S. L. (2012) The research methods knowledge base. methods and statistics: A critical thinking approach, Chapter 12 and Trochim, W. M. K., & Donnelly, J. P. (2008) The research methods knowledge base, pages 191-207.

Answer the following questions:

Jackson, even-numbered Chapter Exercises, pp. 335-337.
Explain the difference between multiple independent variables and multiple levels of independent variables. Which is better?
What is blocking and how does it reduce “noise”? What is a disadvantage of blocking?
What is a factor? How can the use of factors benefit a design?
Explain main effects and interaction effects.
How does a covariate reduce noise?
Describe and explain three trade-offs present in experiments.

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