Which memory system can be enhanced by practice and repetition?

The correct choice is the short-term memory system, as it is significantly influenced by practice and repetition. Short-term memory, also known as primary or active memory, is where information is temporarily held for a brief period, usually around 20 to 30 seconds. Through practices such as rehearsal—repeating information actively—it can maintain or enhance the retention of that information.

Repetition allows for better encoding of the information into short-term memory, making it easier to retrieve later. For example, repeating a phone number several times can help you recall it before you write it down. In this way, practice can improve how effectively information is held in short-term memory, which is crucial for tasks that rely on holding new information in mind temporarily.

In contrast, while long-term memory can also be enhanced through repetition and practice, it encompasses information that has been consolidated and stored over a much longer time. Sensory register involves very short-lived storage of sensory information, and working memory, while related to short-term memory, specifically refers to the processes used to manipulate and work with information in that limited capacity. Hence, the enhancement through practice and repetition is most directly applicable to short-term memory.