Keep the conclusion inside the evidence
Science passages often move from a broad research question to one particular study. The study may support a narrower claim than the headline suggests. This lesson uses a fictional exhibition to practise noticing participants, task conditions and the strength of a conclusion. It gives no advice about changing sleep or treating memory difficulties.
Make two columns in your notes: what was observed and what the observation establishes. Do not fill the second column automatically from the first. Watch for changes from “these participants” to “everyone”, and from “was associated with” to “caused”. The multiple-choice questions reward the option that keeps the original scope.
This is ORIGINAL IELTS-style practice written for this site. It is not an answer key to a Cambridge passage or another named published test. The short lesson develops evidence-finding skills; it is not a complete IELTS test and cannot estimate your band. Read the passage before opening any answer reveal.
- Skim once and give each paragraph a short purpose label in your own words.
- Read each task instruction, then mark the exact evidence for your answer. Keep uncertainty visible instead of guessing silently.
- Check the explanation after answering. If your answer was correct for the wrong reason, record the reasoning error too.
Original passage: The headline above the memory display
Paragraph A gives a brief sourced research context. The exhibition, data, volunteer groups and outcomes in paragraphs B–E are fictional. Do not use them as health evidence or a personal sleep recommendation.
A. Researchers investigate how sleep relates to learning and the organisation of memories. A National Institute of Mental Health research highlight describes work on how new and older memories are handled during sleep, while identifying the particular study and methods behind the findings. Reading such research requires attention to what was actually tested. A fictional science centre used this idea when preparing an exhibit about memory. Rather than promising visitors a method for improving exam results, its educators focused on how to interpret a research claim.
B. The exhibit presented an invented dataset from two volunteer groups completing the same word-pair task. One group returned after an overnight interval; the other returned after a daytime interval. The display showed the number of pairs each participant recalled on the second visit. It also stated that the groups had not been randomly assigned. Visitors were asked to inspect the results as a reading exercise, not to treat the made-up numbers as a finding about real people or to reproduce the schedule themselves.
C. A draft headline announced that the overnight interval had caused better memory. Educator Sam challenged it. The displayed average was higher for that group, but the design did not isolate every difference between the groups. The centre therefore changed the headline to describe an association in the invented example. Beneath it, a question asked what further information would help assess alternative explanations. Sam wanted visitors to see that a careful conclusion could remain interesting without claiming more than the design supported.
D. The task itself introduced another limit. Remembering paired words was not the same outcome as understanding a difficult argument or performing well in an examination. The education team added a card distinguishing the measured task from broader ideas about learning. They also retained individual results alongside the group average. Some visitors had assumed that a higher average meant every person in one group outperformed every person in the other. Seeing the individual records showed why a summary could conceal variation within a group.
E. The final section invited visitors to rewrite the headline and explain one limitation. Staff judged the rewrites for accuracy rather than enthusiasm. A response that denied any possible relationship was no better than one claiming universal improvement: both went beyond the example. The exhibit ended with links to research organisations and a reminder that a short learning activity was not medical guidance. Its purpose was to make readers ask a more useful question: exactly which conclusion follows from these observations, and which conclusion still needs evidence?
Questions 1–9
Answer only from the passage. Outside knowledge may help you understand a topic, but it cannot fill a gap in the writer’s account.
Choose TRUE if the statement agrees with the passage, FALSE if it contradicts the passage, or NOT GIVEN if the passage does not decide it.
Complete each sentence with NO MORE THAN TWO WORDS copied exactly from the passage.
Choose the paragraph, A–E, that contains the specified information. You may use a letter more than once.
Choose the one best answer, A, B, C or D.
- A. The display contained no numerical results at all.
- B. The design did not justify the headline’s causal certainty.
- C. Every participant recalled exactly the same number of pairs.
- D. The headline was too cautious to attract visitors.
- A. To recommend a specific sleep schedule for every visitor.
- B. To diagnose the causes of visitors’ memory difficulties.
- C. To connect the strength of a claim to the evidence available.
- D. To prove that one task predicts every examination result.
Answers with passage evidence
Open these after attempting all nine questions. The paragraph references let you check each judgement against the original wording rather than trusting a bare key.
1. Reveal answer and explanation
FALSE. Paragraph B explicitly says the groups had not been randomly assigned. That detail is one reason to be cautious about causal interpretation. Do not replace the stated design with how you think a stronger experiment ought to have been organised.
2. Reveal answer and explanation
TRUE. Paragraph D says individual results were retained alongside the average. The purpose was to show variation that a single summary could conceal, not to claim that the average was calculated incorrectly.
3. Reveal answer and explanation
NOT GIVEN. No paragraph specifies their occupations or educational status. The use of a word-pair task does not identify the participants as students. The reference to examination performance concerns a broader outcome, not the volunteer recruitment criteria.
4. Reveal answer and explanation
word-pair. Paragraph B uses the hyphenated compound “word-pair”. It is the description of the task, not the interval between visits. Copying the phrase as printed keeps the response within the two-word limit.
5. Reveal answer and explanation
association. Paragraph C replaces a causal headline with an association. The supplied article “an” also fits the word grammatically. “Improvement” alone would miss the central distinction between observing a relationship and establishing a cause.
6. Reveal answer and explanation
D. Paragraph D contrasts recalling paired words with understanding arguments and examination performance. These are distinct outcomes. The passage warns against treating one narrow measure as if it established a universal learning benefit.
7. Reveal answer and explanation
E. Paragraph E says a universal improvement claim and a denial of any possible relationship both exceed the example. Caution is not the same as asserting the opposite. The evidence supports a bounded conclusion.
8. Reveal answer and explanation
B. Paragraph C says the design did not isolate all differences between groups. A higher average therefore did not establish the proposed cause. Sam did not deny the displayed difference or demand a more exciting headline.
9. Reveal answer and explanation
C. Paragraph E asks readers to decide which conclusion follows and which requires more evidence. The exhibit teaches interpretation. It does not prescribe a sleep schedule, diagnose memory problems or promise an examination advantage.
Rewrite without changing the claim
Scientific caution should be specific, not vague. Your rewrite should say what the example shows and why it stops short of demonstrating a cause.
Rewrite the draft claim “The overnight interval caused better memory” as a cautious account of the fictional comparison. Include one design limitation.
Compare a possible rewrite
In the invented comparison, the overnight group had a higher average recall result, but the non-random group assignment means the example does not establish that the interval caused the difference.
This retains the observed comparison while naming a reason for caution. It does not claim that no relationship is possible. “Sleep always improves memory” would broaden the population, task and certainty beyond anything the fictional activity supports.
There is more than one good rewrite. Check meaning before vocabulary: keep the same people, time, comparison, and degree of certainty. A sophisticated synonym is a poor choice if it changes what the passage claims. This writing extension is for learning; the sentence-completion questions above still require exact words from the passage.
Make the next attempt more accurate
Check whether your errors came from importing a familiar health message into the passage. A claim can sound reasonable and still be unsupported by this particular text. Underline the population, task and comparison in each answer. Keep this as a reading lesson; personal health concerns require appropriate professional advice rather than conclusions drawn from invented data.
Keep a three-part error note: the answer you chose, the words you overlooked, and one action for next time. For a NOT GIVEN error, name the missing information. For a completion error, check the word limit and grammar. For a multiple-choice error, explain why the strongest distractor fails, rather than only repeating the correct option.
Continue with writer’s claims, Academic Reading practice, skimming and scanning.
Sources and scope
The NIMH source supports only the broad research context in paragraph A. No numerical data or real study result is reproduced. The invented comparison is solely a lesson in reading evidence and provides no medical, diagnostic or treatment guidance.
- NIMH: How the Brain Creates New Memories While Maintaining Old Ones: Research into the relationship between sleep and the handling of new and older memories.
Public factual sources checked on 15 October 2026. The passage wording, teaching scenario, questions and explanations are original. Fictional people, decisions and results are not evidence about real organisations or populations.