Human memory changes depending on the time. The memory is mainly categorized in two type; STM (Short Term Memory) and LTM (Long Term Memory). The one which changes so often is STM.

STM is always in the risk of “disappear”. It is matter of the time if it continues to exist or not. According to the several doctrine, STM’s life span is said to be for a few seconds to a few months. That is why it is important for your brain to make your STM into LTM in its life span.

For this point of view, I think it is efficient to record the date and time for the subject you have to remember. If possible, I recommend you to know the life span of your STM. For example, if the span is about one month, you can plan to study or remember something in the cycle of one month.

iPhone Speaking APP: Catch Questions is now available with the new recording function of date and time for your Question. If you would like to try it, press the button of “WATCH” next to your Question.