The Testing Effect is dead! Long live the Testing Effect!
Science is a way of trying not to fool yourself. The first principle is that you must not fool yourself, and you are the easiest person to fool. Richard Feynman Yesterday we were told that the much vaunted testing effect (which I've written about here) has been effectively shown to be useless in improving the learning of 'complex' material. Tamara van Gog and John Sweller's provocatively titled paper, Not New, but Nearly Forgotten: the Testing Effect Decreases or even Disappears as the Complexity of Learning Materials Increases explored the 'boundary conditions' of the effect. The abstract of the paper says, [One] potential boundary condition concerns the complexity of learning materials, [...]