Which memory system is primarily used for holding information temporarily while being processed?

The memory system that is primarily used for holding information temporarily while being processed is short-term memory. This system allows individuals to retain a limited amount of information for a brief duration, typically around 20 to 30 seconds, without rehearsal. Short-term memory is crucial for tasks that require immediate attention and processing, such as remembering a phone number long enough to dial it or following a set of instructions.

In contrast, long-term memory refers to the storage of information over extended periods, ranging from days to years, and is not primarily focused on temporary holding or processing. Procedural memory involves the storage of skills and actions and is not typically associated with brief, temporary information retention. Echoic memory is a form of sensory memory specifically related to auditory information, lasting only a few seconds, but it does not serve the same purpose as short-term memory in terms of ongoing processing. Thus, short-term memory is the most relevant and accurate answer for this question, highlighting its role in temporary information handling.