Step 106: Science Says
Professional mastery — High-level questions and diplomatic answers
📖 Read — Sleep, According to Science
A new study from a San Diego university followed 2,000 adults for five years, and its findings are carefully worded — as good science always is. The data suggest that people who sleep before midnight tend to report better memory. Short naps appear to improve afternoon focus, and irregular sleep is associated with higher stress. The lead researcher adds a scientist's caution: “Our study shows an association. It does not prove that one habit causes the other.”
Compare the tabloid version: “MIDNIGHT SLEEP PROVES MEMORY SECRET!” Same study, opposite honesty. Real scientific English lives on a ladder of certainty: prove (rare, mathematical) → show/demonstrate → indicate/suggest → may be linked to → is thought to. Step down the ladder as the evidence weakens — that is not vagueness. That is precision wearing its correct uniform. On this topic, as scientists say, the jury is still out on many questions.
🧩 Grammar — Hedging Verbs — Suggest, Indicate, Tend To
Science speaks in CALIBRATED certainty: strong evidence → show, demonstrate, confirm; medium → indicate, suggest, point to; soft → may, might, could, appears to, seems to; behavioral softeners → tend to (people tend to…). The passive report family removes the speaker entirely: is believed to, is thought to, is expected to, is reported to. And the golden distinction: associated with / linked to (they appear together) is NOT causes (one produces the other). Correlation is a photograph; causation is a mechanism.
- The findings suggest a connection.
- Participants tend to sleep longer on weekends.
- Coffee is believed to affect sleep quality.
- Stress is associated with poor sleep — it isn't proven to cause it alone.
🏗️ Key structures
- The data suggest / indicate that ___ — The data suggest that rest matters.
- ___ is believed / thought to ___ — Sleep is thought to clean the brain.
- ___ is associated with / linked to ___ — Late screens are linked to poor sleep.
⭐ Idiom & natural phrases
The jury is still out on that theory.
🔤 New words
facts and information that show something is true (uncountable)
The evidence points to one conclusion.
the results and discoveries of a study (plural)
The findings were published in June.
show or point to something, with medium certainty
The results indicate a trend.
usually or often do something (a soft pattern verb)
People tend to underestimate sleep.
connected with something — appearing together (not proof of cause)
Stress is associated with insomnia.
a person who takes part in a study or activity
Each participant kept a sleep diary.
a person who studies a subject carefully to discover facts
The researchers followed 2,000 adults.
a study that asks many people questions to collect data
The survey asked about sleep habits.
🎧 Say it with me
The findings suggest that sleep matters. Naps appear to help, stress is associated with poor rest — but the jury is still out on the details.
🎤 Your turn to speak
Report one health claim three ways: too strong, tabloid-style; too weak and useless; and correctly hedged with suggest/may/tend to.
Say it out loud three times. Even better: record it on your phone and listen — your ear is your best teacher.
✍️ Your turn to write
Write a 5-sentence science-news paragraph about a study (real or invented). Use suggest, tend to, is believed to, and associated with.
See a model answer
A new survey of 1,500 teenagers suggests that morning light is associated with better concentration at school. Participants who walked to school tend to report higher energy in first-period classes. Walking is believed to reset the body's daily clock. The researchers are careful, however: the study shows an association, not a cause. The jury is still out — but the school bus may have competition.
Self-check: capital letters? Full stops? Did you use the grammar of this step?
📝 Quick check
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