Dr. Bjork is a leading expert in the field of applied memory research and its implication for education and instruction. In this interview he outlines his main theory of long-term memory (the new theory of disuse) and how losing access to memories is a precondition to forming stronger and long-lasting memories during the learning process. This can be demonstrated through many beneficial effects on long-term learning - like the spacing effect, interleaving practice, and producing content instead of just passively processing it.