There are two main categories. Explicit memory is a memory that can be intentionally and consciously recalled. This is your memory of riding a bike and falling over the handlebars and skinning your knee. The other is implicit memory which is an exponential functional form of memory that cannot be consciously recalled. This is your memory of how to ride a bike or how to balance. These are often not tied to visual memory, but more like muscle memory. Examples of implicit memory include using language naturally, driving and reading, and answering multiple questions in the test. Let's look at explicit and implicit memory in a little more detail, and see how age influences these. It is an experimental or functional form of memory. Explicit memory consists of a great deal of highly personal memories related to time, space and people. It is totally different from implicit memory. Now, if we look at the examples of explicit memory, it includes remembering people's birthdays and answering questions.