Final answer:
Chunking, rehearsal, and elaboration are all strategies that can be used to increase the amount of information held in short-term memory by organizing information, repeating it, and making meaningful connections.
Step-by-step explanation:
To increase the number of pieces of information that can be held in short-term memory, all of the above strategies can be used: chunking, rehearsal, and elaboration. Chunking involves organizing information into manageable bits, which makes it easier to remember.
For example, breaking down a phone number into sections can aid in memorization. Rehearsal refers to the conscious repetition of information to move it from short-term to long-term memory, such as singing the alphabet song to learn the ABCs. Lastly, elaboration ties new information to existing knowledge, enhancing memory by adding personal meaning or connections, which may involve the linking of the information to something familiar or the creation of personal associations.