Psychology Reader

What Are the Differences Between Long-Term, Short-Term, and Working Memory?

Nelson Cowan · 2008 · Progress in Brain Research: Essence of Memory

Role
Major synthesis · Foundational argument
Difficulty
Moderate
Full work length
16 pages
Type
Book chapter

Access

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Reading focus

Syllabus: How Can We Study the Mind?

Develop a vocabulary for interpreting memory tasks without assuming that each task measures a separate mental store. Connect attention and long-term knowledge to temporary performance.

A question to consider. If a familiar sequence is easier to repeat than an unfamiliar one of the same length, what does that imply about interpreting a memory-span score?

Why this reading

Memory terms are useful only if we understand the distinctions they make. Cowan compares accounts of temporary retention, attention, and long-term knowledge, connecting terminology to the evidence that might support separate processes or systems.

Before you read

A memory task measures performance under particular demands; it does not automatically isolate a single store. A chunk is a meaningful grouping of information. Interference concerns competing information, whereas decay is loss attributed to time. Working memory has several definitions, which the chapter explicitly compares.

Read for

  1. Compare the different meanings of working memory and ask which makes a claim about storage, attention, or using information.
  2. Examine the evidence offered for distinctions between short-term and long-term memory, including the alternative interpretations.
  3. Use the models and diagrams to trace how current attention and stored knowledge could jointly support performance.

Consider afterwards

  1. Someone can repeat a short instruction but loses track while carrying it out. Which explanation would concern retention, which would concern attention, and what task comparison could distinguish them?

Editorial context

This is a theoretical review and book chapter, not a new experiment or a declaration that one vocabulary has won. Cowan evaluates competing accounts from his own theoretical position. Numerical capacity estimates depend on how information and task demands are defined; they should not become a fixed universal score for a person’s memory.