Room 3 · Hall of Methods
Chunking
Strong evidence
Your short-term memory holds only a few items at a time. Chunking gets around the limit by grouping small pieces into bigger ones. You still hold a few items; each one just carries more.
Try it
Read this once, then look away and repeat it: 1 4 9 2 1 7 7 6 1 9 6 9.
Now try it as three chunks: 1492 · 1776 · 1969. Three dates instead of twelve digits.
The same trick works everywhere: phone numbers in pairs or triplets, a long list split into groups of three, a speech split into a few big points.
What research says
- In 1956 the psychologist George Miller described short-term memory as holding about seven items, give or take two, and showed that recoding information into chunks lets us hold more.
- Later work suggests that when we can’t rehearse or group, the real limit is closer to four chunks (Cowan, 2001). That is exactly why chunking matters.
Practise it
Memory Test: try the digit test once as it comes, then again reading the digits in pairs.
Sources (2)
- Miller GA (1956). The magical number seven, plus or minus two. Psychological Review 63(2):81–97. doi:10.1037/h0043158
- Cowan N (2001). The magical number 4 in short-term memory. Behavioral and Brain Sciences 24(1):87–114.