2026-W20
Strong AD intuition but major weakness on multi-shift market diagrams
Students showed reliable understanding of standard AD responses (interest rates, confidence) but struggled with combined supply/demand diagram work in micro markets.
Published May 24, 2026
Total quiz attempts
832
Average score
80.1%
Overall question accuracy
77.8%
Average response time
94 s
Lowest question correct rate (example)
15% — Micro diagram (unit 2.2)
1. Weekly Overview
Macro intuition is strong; diagram skills in Micro need targeted practice.
Aggregate quiz data (832 attempts across 142 users) shows high overall performance (avg score ~80%) and consistent correct answers on standard AD scenarios (interest rate and confidence effects). The clearest weakness is interpreting and drawing combined market shifts and willingness-to-pay changes in Microeconomics (unit 2.2), where a representative diagram question had a very low correct rate. Time-on-question varies: some longer-response items were answered correctly, suggesting careful working for complex prompts.
Student takeaway: Prioritise practicing multi-shift supply/demand diagrams and short-run AD mechanics for fiscal policy and exchange-rate effects.
2. Key Patterns
Main Insights
Weakness: combined market-diagram questions (Micro, unit 2.2)
A multi-shift diagram question about EdTech market entry plus a free resource reducing willingness to pay had the lowest correct rate (15%) and high wrong-rate (85%), indicating difficulty with simultaneous supply/demand changes and interpreting willingness-to-pay shifts.
Advice: Practice stepwise diagram construction: (1) identify which curves shift, (2) show each shift separately, (3) combine shifts and label final price/quantity changes; use clear labels for willingness to pay vs demand.
Strength: standard AD responses are well understood (Macro, unit 3.2)
Questions on the AD effects of lower interest rates and improved household confidence showed high correct rates (91% and 100% respectively), suggesting firm grasp of how monetary policy and confidence drive AD in the short run.
Advice: Keep reviewing the components of AD (C, I, G, NX) and practice mapping specific policy or expectation changes to those components and the AD curve.
Mixed performance on fiscal policy and exchange‑rate AD channels (Macro, unit 3.2)
Items on government spending vs indirect tax effects and on depreciation effects on AD had relatively low correct rates (40–49% and 35%), indicating specific confusion over how taxes, spending and exchange rates feed into C, I, G, NX.
Advice: When revising fiscal and exchange-rate impacts, map each policy to the AD components (e.g., indirect taxes → lower disposable income → C) and practice short-run diagram shifts for each channel.
3. Revision Plan
Priority Areas
Combined supply and demand diagrams (multi-shift) · 2.2 (Microeconomics)
Lowest correct rate and high wrong-rate on a representative multi-shift diagram question.
Action: Work through 6–8 practice diagrams that require sequential shifts; write brief explanations for each step and check final price/quantity outcomes.
Fiscal policy: spending vs indirect taxes (short run) · 3.2 (Macroeconomics)
Confusion between effects of government spending and indirect taxes on AD and disposable income.
Action: Make a 1‑page map linking spending/taxes to AD components and complete 10 short-answer questions applying the map.
Exchange-rate effects on AD (net exports channel) · 3.2 (Macroeconomics)
Low accuracy on depreciation impact questions shows trouble tracing NX changes to AD.
Action: Practice 5 problems converting currency movements into export/import price changes and resulting AD shifts; sketch AD movements each time.
AD–SRAS–LRAS interactions below full employment · 3.6 (Macroeconomics)
Some uncertainty on which curve shifts first and the short-run focus when closing deflationary gaps.
Action: Do 4 step-by-step AD–SRAS–LRAS diagram exercises emphasising short-run demand responses and labelling immediate vs long-run effects.
4. Question Evidence
Featured Questions
Most Wrong Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| What is the effect on the economy(in the short run) when the government increases its spending on public healthcare and education? | Macroeconomics | 3.2 | 73 | 49.3% | 50.7% | 38.2 s |
| If the government raises indirect taxes (such as VAT) on most goods and services, how is the economy affected? | Macroeconomics | 3.2 | 55 | 40.0% | 60.0% | 25.0 s |
| What happens to aggregate demand if the domestic currency depreciates sharply against major trading partners’ currencies? | Macroeconomics | 3.2 | 48 | 35.4% | 64.6% | 29.9 s |
| In a single diagram for IB Economics revision courses, show what happens when more EdTech firms enter the market while a new, very effective free online resource reduces students' willingness to pay for paid courses. | Microeconomics | 2.2 | 33 | 15.2% | 84.8% | 1.3 min |
| In a Keynesian AD–SRAS–LRAS diagram, Ibonomica is operating well below full employment on the relatively flat section of the AS curve. The government implements a large increase in infrastructure and education spending to close the deflationary gap. Which curve shifts first, and in which direction, when focusing on the short-run demand-side impact? | Macroeconomics | 3.6 | 61 | 59.0% | 41.0% | 2.4 min |
Most Correct Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| How is aggregate demand affected if business expectations about future profits worsen sharply, leading firms to postpone or cancel investment projects? | Macroeconomics | 3.2 | 67 | 80.6% | 19.4% | 1.3 min |
| In the short run, what is the effect on aggregate demand when central banks significantly lower interest rates, making it cheaper for firms to borrow and invest in new machinery? | Macroeconomics | 3.2 | 57 | 91.2% | 8.8% | 43.1 s |
| How is aggregate demand affected when households become more confident about the future and expect their incomes to rise? | Macroeconomics | 3.2 | 51 | 100.0% | 0.0% | 49.1 s |
| The economy is at or very close to full employment when the government of Ibonomica unexpectedly raises government spending to boost popularity before an election. Focusing on the demand-side effect, which curve shifts in the short run and in which direction? | Macroeconomics | 3.6 | 59 | 78.0% | 22.0% | 53.2 s |
| Over many years, the central bank of Ibonomica maintains low and stable interest rates, encouraging persistent increases in private investment in new technologies and capital equipment. In the AD–SRAS–LRAS diagram, which curve is most likely to shift in the long run as a result of this monetary policy, and in which direction? | Macroeconomics | 3.5 | 53 | 83.0% | 17.0% | 56.9 s |
Most Time Spent Questions
| Question | Topic | Unit | Attempts | Correct | Wrong | Avg Time |
|---|---|---|---|---|---|---|
| Why might the loss of monetary policy autonomy be problematic for countries in a monetary union? | Global Economics | 4.4 | 4 | 100.0% | 0.0% | 287.0 min |
| What is a multilateral trade agreement? | Global Economics | 4.4 | 5 | 100.0% | 0.0% | 147.3 min |
| In IB Economics, how is income elasticity of demand (YED) defined? | microeconomics | 2.5 | 10 | 100.0% | 0.0% | 130.3 min |
| Why do governments often place high taxes on demerit goods like tobacco? | Microeconomics | 2.5 | 8 | 87.5% | 12.5% | 128.4 min |
| Marginal analysis is used to explain which of the following? | Introduction to Economics | 1.2 | 4 | 100.0% | 0.0% | 113.0 min |
5. Conclusion
Focus practice on diagrams and AD channels
Keep using short, labelled diagrams and map policy changes to AD components; prioritise multi-shift supply/demand practice in Micro and targeted short-run fiscal/exchange-rate AD problems in Macro.
Note: This weekly report is automatically generated and may contain mistakes. Always double-check key points before using them for revision.
This report is based on anonymized aggregate quiz activity and group-level analytics only; it does not include or imply any individual student data.