16Hit1600
Expression of IdeasVery hardAcknowledging a limitation of a finding

Expression of Ideas practice question

While researching a topic, a student has taken the following notes: - A study asked 60 office workers to take a 10-minute walk at noon for a month. - Afternoon alertness scores rose by an average of 14%. - All 60 participants volunteered for the study. - There was no comparison group that stayed at their desks.

The student wants to present the study's finding while acknowledging a limitation. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  1. A. Afternoon alertness rose 14% among the walkers, though without a comparison group it is unclear how much of the rise the walks caused.Correct
  2. B. A noon walk raises afternoon alertness by 14%.
  3. C. Sixty office workers took part in the study.
  4. D. The participants all volunteered.

Answer: A. Afternoon alertness rose 14% among the walkers, though without a comparison group it is unclear how much of the rise the walks caused.

The finding and the missing comparison group, with the consequence spelled out.

Why the other answers are wrong

B. A noon walk raises afternoon alertness by 14%.
States the finding as a settled cause with no limitation.
C. Sixty office workers took part in the study.
A detail of the sample, no finding or limitation.
D. The participants all volunteered.
A limitation with no finding attached.

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