According to the three box model of memory, the storage capacity of long-term memory is ________.

• A. limited to a few hours
• B. approximately 20 seconds
• C. virtually unlimited
• D. about 7 plus or minus 2 items

Answer: (C)

Verified step by step guidance

1. Understand the three-box model of memory, which includes sensory memory, short-term memory, and long-term memory, each with different characteristics in terms of duration and capacity.
2. Recall that sensory memory holds information very briefly (milliseconds to seconds), short-term memory holds information for about 20 seconds and has a limited capacity (around 7 plus or minus 2 items).
3. Recognize that long-term memory differs from the other two by having a much larger capacity and duration, allowing information to be stored for extended periods, potentially a lifetime.
4. Identify that the question asks specifically about the storage capacity of long-term memory, which is known to be very large compared to sensory and short-term memory.
5. Conclude that, according to the three-box model, the storage capacity of long-term memory is considered virtually unlimited, meaning it can hold an enormous amount of information over long periods.