Outline Need for Rehearsal (Serial Position Curve, Peterson & Peterson) Primacy Effect Recency Effect Duration of STM Role of Interference (Waugh & Norman) Proactive Interference (Wickens) Retroactive Interference Limited Capacity (Miller, 1957) Verbal code Searching through STM (Sternberg) Problems with STM concept: STM codes are not just verbal Can improve STM by using LTM Transfer to LTM is not just because of rehearsal