Elaborative Interrogation
Ask "why?" and "how?" to deepen understanding
What the Research Says
Most students revise by memorising facts: dates, names, events. But History exams reward explanation — you need to say WHY things happened and HOW one event connects to another. Elaborative interrogation forces you to ask these questions during revision, which builds the deeper understanding that turns a basic recall answer into a top-band response. For OCR History in particular, the high-mark questions (25-mark essays, the 24-mark change-and-continuity essay) all demand causal chains, not lists of facts.
Evidence Base
| Study | Finding | Impact |
|---|---|---|
| Pressley et al. (1987) | Students who asked "why?" while reading recalled 72% of material vs. 37% for those who just read | Nearly double the recall |
| Dunlosky et al. (2013) | Elaborative interrogation rated MODERATE utility — highly effective when students already have background knowledge | Ideal for revision, not first learning |
| Chi et al. (1994) | Self-explanation — explaining material to yourself — produced better learning than simply studying examples | Explaining builds understanding |
Step-by-Step Method
-
1
Read a section of your notes — Pick one lesson or part of a lesson. Read through it once to remind yourself of the content.
-
2
Stop at each key fact — Every time you hit an important cause, consequence, or turning point, pause. Don't just move on.
-
3
Ask "Why?" or "How?" — Why did this happen? How does it connect to what came before? Why did this decision have this consequence? How might historians disagree about its significance?
-
4
Answer from memory first — Try to explain the answer in your own words before checking your notes. Write it down in one or two sentences.
-
5
Build a causal chain — Link your "why" answers together: A happened because of B, which led to C, which caused D. This is exactly the structure the 25-mark essays reward.
-
6
Self-test — Close your notes and try to reconstruct the causal chain from memory. Check for gaps.
When and How Often
Each topic takes about 15 minutes with this method. Use it after you have already studied a topic at least once — you need some background knowledge for the "why" questions to work. Best combined with retrieval practice: do a brain dump first, then use elaborative interrogation on the parts you recalled.
Fact: Nazi vote share fell from 37.3% in July 1932 to 33.1% in November 1932, yet Hitler became Chancellor in January 1933.
Why? Why did Nazi support fall just before Hitler came to power?
Answer: By late 1932, some voters who had backed the Nazis in protest during the crisis years began to look elsewhere as the most acute economic panic eased. The Nazi Party was also running short of money and showing internal strain. This drop was a warning sign that the window of opportunity was narrowing.
How did Hitler become Chancellor despite falling support? → Elite miscalculation: von Papen persuaded President Hindenburg that Hitler could be controlled as Chancellor with conservatives holding most cabinet posts. Papen thought he could use Hitler's mass movement while keeping power himself.
Why did that calculation prove wrong? → Hitler quickly outmanoeuvred the conservatives — the Reichstag Fire Decree (28 February 1933) and the Enabling Act (23 March 1933) removed constitutional constraints before the conservatives could reassert themselves.
Electoral fatigue → Nazi vote falls November 1932 → fear of window closing → Papen–Hitler deal → Hindenburg appoints Hitler Chancellor 30 January 1933 → Reichstag Fire → Enabling Act → dictatorship secured
Why this works: Instead of just memorising "Hitler appointed 30 January 1933", you now understand the political mechanism — exactly what the "explain why" and essay questions demand.
Common Mistakes
-
Only asking "what" questions — "What happened at Munich?" tests recall but doesn't build understanding. Always push to "why" and "how".
-
Accepting vague answers — "Because things got worse" is not an explanation. Push yourself to give specific causal reasons with named evidence.
-
Skipping the self-test — Building the causal chain is only half the work. You need to close your notes and reconstruct it from memory to lock it in.
-
Not connecting across lessons — The best causal chains link events from different topics. The Great Depression connects to Nazi rise, which connects to appeasement, which connects to the outbreak of war.