Begin with a commonly held belief about educational practice and follow the evidence to see if the practice is warranted. This is the approach taken by Pashler, McDaniel, Rohrer, and Bjork (this volume) concerning the learning-styles hypothesis—the proposal that instructional methods should be aligned with the student’s learning style. Although the learning-styles hypothesis is part of the folklore of educational practice, the authors seek to determine whether there sufficient evidence to justify its implementation. Accordingly, the most compelling evidence for the learning-styles hypothesis would be a crossover interaction in which type A learners learn better with instructional method A whereas type B learners learn better with instructio...