Some theories hold that short-term memory consists of a fixed number of slots. For those theories, the capacity of short-term memory was once thought to be 7 plus-or- minus 2 items. However, that...

Extracted text: Some theories hold that short-term memory consists of a fixed number of slots. For those theories, the capacity of short-term memory was once thought to be 7 plus-or- minus 2 items. However, that estimate has been revised. How and why? O The estimate has been revised downwards to 1 or 2 items because that is how many items people can recall from short-term memory when they are given meaningless items to rehearse O The capacity of short-term memory is now thought to be unlimited if the words are meaningful because understanding is the same as encoding into short-term memory The estimate has been revised upwards to 10 plus-or-minus 3 items because people are able to chunk items more than was previously believed O The estimate has been revised downwards to 3 or 4 items because that is how many items people can recall from short-term memory when they are unable to chunk the information