Calibrating Claims: A Supplement Trial
An OAT passage reports: 'In a 12-week trial of 84 adults, participants taking 300 mg of the extract scored, on average, 4 points higher on a 60-point recall test than those taking a placebo. The authors describe the difference as modest and preliminary, noting that the study was not designed to detect long-term effects and that the sample skewed young. A follow-up is underway.' A question asks: 'Which statement is best supported by the passage?' The student narrows to three options: (A) The extract improves long-term memory. (B) The extract may modestly aid recall in young adults, pending further study. (C) The extract has no effect on memory. The student rules out C immediately but hesitates between A and B because the trial did show a gain.
1. Choose the best-supported statement and explain how the wording of the passage settles the choice.
Read the worked answer
B. Match the strength of the answer's verb to the strength of the evidence. The passage's language is deliberately calibrated: 'modest' (4 points on a 60-point test), 'preliminary,' 'not designed to detect long-term effects,' and a sample that 'skewed young.' Option B reproduces that calibration with 'may,' 'modestly,' 'young adults,' and 'pending further study.' Option A commits two upgrades at once - from short term to long term and from a small average gain to a general improvement - that the passage explicitly declines to make. Option C is excluded by the observed 4-point difference; 'not proven' is not the same as 'no effect.'
2. A distractor reads: 'The study proves the extract works.' Identify the separate errors in that statement.
Read the worked answer
There are two independent errors. First, 'proves' overstates what a single 12-week trial of 84 volunteers can establish; the authors themselves call the result preliminary and note the sample's youth, so the evidentiary base cannot support proof. Second, 'works' is underspecified: works for whom (young adults?), for how long (12 weeks?), on what (a laboratory recall test rather than everyday memory?), and by how much (4 points)? A careful answer must carry the study's scope. The student should also notice the either/or trap: rejecting 'proves' does not require accepting 'no effect.'
3. If a question asked for the author's tone toward the extract, which words would fit and which would not?
Read the worked answer
Cautious, measured, hopeful but guarded. The author reports the gain without editorializing, lets the researchers' hedges stand, and mentions a follow-up rather than a conclusion. A tone answer must be defensible from diction, not from the student's own optimism or skepticism. 'Enthusiastic' fails because no superlatives or exclamation appear; 'dismissive' fails because the author reports the gain and notes continuing research instead of calling the extract useless. The safe rule is to pick the tone word that the passage's own adjectives and verbs can support in a single quoted phrase.