A between subjects design is less efficient than a within subjects design because ____________?
Correct answer: D. it must deal with difference among subjects
- A. it has more subjects
- B. it has less validity
- C. it is less reliable
- D. it must deal with difference among subjects
- E. None of these
Explanation
A between-subjects design uses different participants in each condition, so individual differences between participants can add error. A within-subjects design exposes the same participants to all conditions and therefore controls those differences more effectively.
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