Which of the following research situations would be most likely to use an independent-measures design?
A)Examine the development of vocabulary as a group of children mature from age 2 to age 3.
B)Examine the long-term effectiveness of a stop-smoking treatment by interviewing subjects 2 months and 6 months after the treatment ends.
C)Compare the mathematics skills for 9th-grade boys versus 9th-grade girls.
D)Compare the blood-pressure readings before medication and after medication for a group a patients with high blood pressure.

Question

Quizplus · Accepted Answer

An independent-measures design involves comparing two separate groups. The scenario that involves comparing 9th-grade boys versus 9th-grade girls represents two separate groups and thus would most likely use an independent-measures design. The other scenarios either involve studying the same group over time (A and B) or comparing the same group before and after receiving treatment (D), which would not require an independent-measures design.

Which of the Following Research Situations Would Be Most Likely