demonstrations:short_term_memory
Short-Term Memory
Materials: ★☆☆ Easy to get from supermarket or hardware store
Difficulty: ★☆☆ Can be easily done by most teenagers
Safety: ★☆☆ Minimal safety procedures required
Categories: The Brain and Nerves, Psychology
Alternative titles: Test Your Memory With Word Lists
Summary
Participants try to memorize and recall a list of unrelated words within a short time frame, demonstrating the limits of short-term memory capacity. They then attempt a second list organized into categories, showing how chunking strategies can improve recall.
Procedure
- Present participants with a list of 25 unrelated words.
- Allow two minutes for participants to study and memorize the words.
- After the time is up, remove the list and give participants two minutes to recall and write down as many words as possible.
- Count the number of correct words recalled.
- Repeat the activity using a second list of words that are grouped by categories (e.g., animals, colors, furniture, school, fruits).
- Compare recall rates between the random list and the categorized list.
Links
📄 A Simple DIY Short-Term Memory Experiment - verywellmind: https://www.verywellmind.com/a-short-term-memory-experiment-2795664
Variations
- Test with different list lengths (10, 20, or 30 words).
- Vary the study time (30 seconds, 1 minute, 2 minutes) and see how it affects recall.
- Change the delay before recall (immediate vs. waiting several minutes).
- Try with images or numbers instead of words.
Safety Precautions
- Ensure participants do not feel pressured or judged for recall performance.
Questions to Consider
- How many words did you recall from the first random list? (Most people recall around 5–9 items, matching George Miller’s finding of 7±2.)
- Why was it easier to remember the second list? (Chunking and categorization help organize information in memory.)
- What other strategies might improve short-term memory performance? (Rehearsal, visualization, association, mnemonic devices.)