Controlled Experiments: Exemplary Controlled Experiments
In keeping with the strategy of learning by example, one of the best ways to learn to do controlled experiments is to look at controlled experiments performed by others.
For incredible examples of controlled experiments in education, I recommend Neil Heffernan's work on ASSISTments as a researcher's tool. A full list of controlled experiments completed with ASSISTments can be found here.
I would especially recommend looking at the following studies, both for their demonstration of the design of controlled experiments and for their interesting conclusions:
- Does Immediate Feedback While Doing Homework Improve Learning, from Paul Kehrer, Kim Kelly, and Neil Heffernan of Worcester Polytechnic Institute
- What Level of Tutor Interaction is Best?, from Leena Razzaq, Neil Heffernan, and Robert Lindeman of Worcester Polytechnic Institute
- Is it Better to Give Hints or Let Students Ask?, from Leena Razzaq of the University of Massachusetts-Amherst and Neil Heffernan of Worcester Polytechnic Institute
- Choice in Feedback Mediums, from Korinn Ostrow and Neil Heffernan of Worcester Polytechnic Institute
- Comparing discovery learning with direct instruction replicating (and extending) the famous Klahr and Nigam result, from Michael Sao Pedro, Janice Gobert, Neil Heffernan, and Joseph Beck of Worcester Polytechnic Institute
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