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Psychology
Grade 9-12
Memory Types (Sensory, Short-Term, Long-Term) Cheat Sheet
A printable reference covering sensory memory, short-term memory, working memory, long-term memory, encoding, storage, and retrieval for grades 9-12.
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This cheat sheet explains the three major memory types: sensory memory, short-term memory, and long-term memory. Students need these ideas to understand how information enters the mind, is briefly held, and becomes stored for later use. It also helps connect everyday study habits to psychological concepts such as attention, rehearsal, and retrieval. The topic is important in introductory psychology because memory affects learning, decision-making, and behavior.
Key Facts
- Sensory memory holds raw information from the senses for a very brief time, usually less than 1 second for visual information and about 2 to 4 seconds for auditory information.
- Short-term memory holds a small amount of information for about 15 to 30 seconds without active rehearsal.
- Working memory is the active part of short-term memory that lets a person hold and mentally use information, such as solving 27 + 36 in your head.
- The common short-term memory capacity rule is 7 plus or minus 2 items, although many modern studies suggest about 4 chunks is more typical.
- Chunking improves short-term memory by grouping separate items into meaningful units, such as remembering 177620011945 as 1776, 2001, and 1945.
- Long-term memory can store information for minutes, years, or a lifetime, and its capacity is considered very large.
- Explicit long-term memory includes facts and events, while implicit long-term memory includes skills, habits, and conditioned responses.
- Memory processing is often described as encoding, storage, and retrieval: information is put in, kept over time, and brought back when needed.
Vocabulary
- Sensory memory
- A brief memory store that holds incoming sights, sounds, smells, tastes, and touch information before attention selects what to process.
- Short-term memory
- A temporary memory store that holds a limited amount of information for a short time.
- Working memory
- The active system that holds and manipulates information during thinking, problem solving, and comprehension.
- Long-term memory
- A relatively permanent memory store that can hold large amounts of information for long periods of time.
- Encoding
- The process of changing information into a form that can be stored in memory.
- Retrieval
- The process of bringing stored information back into conscious awareness or using it to guide behavior.
Common Mistakes to Avoid
- Confusing sensory memory with short-term memory is wrong because sensory memory is almost immediate and automatic, while short-term memory requires attention and lasts longer.
- Saying short-term memory lasts for hours is wrong because unrehearsed short-term memory usually fades in about 15 to 30 seconds.
- Treating working memory and long-term memory as the same thing is wrong because working memory is active and temporary, while long-term memory stores information over time.
- Assuming rehearsal always creates strong long-term memory is wrong because simple repetition may be weaker than meaningful encoding, examples, and connections.
- Forgetting that retrieval is part of memory is wrong because stored information must be accessed before it can be used or reported.
Practice Questions
- 1 A student hears a phone number and remembers it for 20 seconds by repeating it silently. Which memory type is being used most directly?
- 2 A list has 12 random letters: K, B, T, Q, L, M, R, S, W, F, N, P. If a student can hold about 4 chunks in working memory, how could chunking improve recall?
- 3 Classify each example as sensory, short-term, working, or long-term memory: seeing a sparkler trail for a split second, remembering a locker combination from last year, and doing mental multiplication.
- 4 Explain why paying attention is necessary for some sensory information to move into short-term memory.