Retrieval Practice
Test yourself, don’t just re-read
What the Research Says
Retrieval practice is the act of recalling information from memory without looking at your notes. Decades of cognitive science research shows this is one of the most powerful study techniques, far more effective than re-reading or highlighting.
Evidence Base
| Study | Finding | Impact |
|---|---|---|
| Roediger & Karpicke (2006) | Students who tested themselves retained 80% after a week; those who re-read retained 36%. | 2× better retention |
| Dunlosky et al. (2013) | Rated retrieval practice as the highest-utility learning strategy across all subjects. | Top-rated technique |
| Agarwal et al. (2021) | Retrieval practice improves transfer — applying knowledge to new problems, not just recalling facts. | Better exam performance |
Step-by-Step Method
- 1Close your notes — Put your textbook, revision guide, and phone away. You must recall from memory, not recognition.
- 2Brain dump — Write everything you can remember about a topic (e.g. “Network topologies”) on a blank sheet. Diagrams count.
- 3Check and correct — Open your notes. Mark what you got right in green, what you missed in red. The red items are your revision priorities.
- 4Repeat after a gap — Wait 1–2 days, then brain dump the same topic again. Focus on the red items. Spacing strengthens memory.
Close your notes and draw a diagram of the CPU, labelling the ALU, Control Unit, Cache, MAR, MDR, Program Counter, and Accumulator. Add arrows showing data flow. Then check against your textbook.
Write a list of all the protocols you can remember (TCP/IP, HTTP, HTTPS, FTP, SMTP, IMAP). For each one, write what it does and which layer of the TCP/IP model it belongs to. Check and fill gaps.
Without looking, write out the steps of bubble sort and merge sort in pseudocode. Then trace through a sample list (e.g. [5, 3, 8, 1, 2]) showing each pass. Compare with the correct algorithm.
Common Pitfalls
- Peeking at notes too soon — The struggle of trying to remember is what strengthens memory. Wait at least 5 minutes before checking.
- Only recalling easy facts — Focus on the topics you find hardest. Easy recall does not build new memory.
- Not spacing the repetitions — Doing 3 brain dumps in one evening is less effective than one today, one in 2 days, and one next week.
When to Use This
Start retrieval practice from the very first week of revision. Do 2–3 brain dumps per study session (15 minutes each). In the final weeks, use it daily to consolidate the topics you have already covered.