Final answer:
The range of an average person's short-term memory capacity is between 5 and 9 items. Short-term memory storage lasts for about 15 to 30 seconds before the information is either transferred to long-term memory or forgotten. Long-term memory has an unlimited storage capacity.
Step-by-step explanation:
The capacity of an average person's short-term memory is generally between 5 and 9 items, known as the "magic number" 7 plus or minus 2 according to George Miller's research. However, more recent research suggests that working memory capacity is closer to 4 plus or minus 1. Short-term memory storage lasts for about 15 to 30 seconds before the information is either transferred to long-term memory or forgotten.
Short-term memory is like the information displayed on a computer screen, while long-term memory is the continuous storage of information that happened more than a few minutes ago. Long-term memory is believed to have an unlimited storage capacity, while short-term memory is limited and can hold about 5 to 9 items.