Capacity - Measure of how much can be held in memory/
Long-term memory has potenially unlimited capacity.
Capacity of short-term memory, about 7±2, George Miller (1956). Millr also found that we can recall 5 words as well as we can recall 5 letters - we can chunk things together and can then remember more.
Chunking - Miller proposed the capacity of STM can be enhanced by grouping sets of digits or letters and making them into useful units or 'chunks'.
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