“…The generalization potential for learning is just as important a facet of efficiency, even though far more research on assessment is needed to develop adequate measures of generalization potential. Several specific proposals for training flexibility in thought are presented in the articles that follow: focusing on interactions between surface features (Chi & VanLehn, 2012/this issue), invention-based training (Schwartz et al, 2012/this issue), comparison-based training (Richland et al, 2012/this issue), actor-oriented approaches (Lobato, 2012/this issue), taking advantage of well-grounded perception and action processes (Day & Goldstone, 2012/this issue), and explicit framings to encourage developing transportable representations (Engle et al, 2012/this issue). Rote training procedures may achieve efficient learning of specific behaviors, but this is only a short-term goal.…”