Select Presentations

More Than Main Effects: Designing Randomized Experiments to Test Moderators and Mediators of Student Achievement, at STEM Education Research Designs, Conceptual and Practical Considerations for Planning Experimental Studies, National Science Foundation, Monday, November 2, 2009:


  • What are moderators and mediators (conceptual framework)

  • Concrete example from RCT of READ 180 (statistical framework)

  • Discuss results from RCT using different statistical models

  • Conclude with key lessons relevant to RCTs in various content areas (literacy, math, science)