Tomasz Szynalski, Poland, Oct 18, 1998) Question: What value of the forgetting index ensures the optimum ratio of (retention)/(time spent per day)?
Paradoxically, the highest speed of learning can be accomplished … without SuperMemo! In our daily life we pick up lots of facts that stay in our memory for long with few repetitions in lifetime! The problem is that these are usually not exactly the facts or rules that are critical to our goals. In other words, not the speed of acquiring new items counts but the speed of acquiring new items bearing a given content. It is difficult to determine exactly what forgetting index brings the highest acquisition rate. Simulation experiments have consistently pointed to the value of 25-30%. You can even plot speed-vs.-forgetting graph using your own actual learning material in SuperMemo 98 using Tools : Statistics : Simulation. You will probably also arrive to similar results As you perhaps know, SuperMemo disallows of the forgetting index above 20%. This comes from the fact that you should aim at achieving high speed of learning combined with high retention of the learned material. Setting th
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