Data Grouping Error in IELTS Task 1
Task 1 · Grouping · May 2026
Direct answer
The data-grouping error trap is when your report lists accurate figures in the wrong clusters. You jump from 2010 sales to 2015 profits to 2012 exports in one paragraph. Examiners read for logical overview and grouped detail—scattered series feel like a data dump, not a report. Task Achievement drops even when numbers are right.
How the trap shows up
Year hop 2010 then 2015 then 2012 in one block
Category mix Sales and demographics combined
Unit clash Percentages beside raw counts unlabelled
Grouping traps that cap Task Achievement
| Trap | Why it fails |
|---|---|
| Chronological scatter | No overview thread |
| Compare unlike series | Country A vs global total |
| Mini-lists | Every figure, no grouping |
| Overview missing | Facts correct, structure wrong |
Contrast with data selection traps.
Fix: one grouping rule per paragraph
Overview names the main split (by time or by category). Body 1 follows that rule; body 2 continues it. Never introduce a third grouping logic mid-report.
Key takeaways
- Pick one grouping principle and apply it consistently.
- Overview must preview how paragraphs are organised.
- Do not mix years, categories, and units in one block.
- Accurate figures in wrong groups still lose marks.
FAQ
Group by time period, category, or comparison pair—pick one logic and stick to it.
Yes when the chart has only two series—otherwise split paragraphs.
Selection is what to include; grouping is how you organise what you include.
Check whether your Task 1 paragraphs follow one clear grouping logic.
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