What is primarily being enhanced through the use of rehearsal in memory tasks?

The use of rehearsal in memory tasks primarily enhances the likelihood of retention. Rehearsal involves the active repetition of information, which reinforces neural connections and makes it more likely for that information to be stored in long-term memory. When information is rehearsed over time, it can move from short-term to long-term memory, increasing the chances that it can be recalled later.

While the other factors, such as the accuracy of retrieval and the duration of storage, may benefit from rehearsal, the core purpose of rehearsal is to keep information in mind longer and to ensure that it can be remembered when needed. It promotes retention by providing a structured way to encode and reinforce memories, leading to better retention over time.