A sentence in an abstract of an article reads: "Compared to baseline scores, volunteers assigned to the intervention condition showed greater improvement at the six-month follow-up assessment than those assigned to an attention-equivalent comparison condition." Given this sentence, the study design must be a:

Question

Quizplus · Accepted Answer

The sentence indicates that there was a baseline score and a follow-up assessment, suggesting that measurements were taken before and after the intervention, which is characteristic of a pretest-posttest design. Additionally, the mention of "assigned" conditions implies randomization, making it a randomized controlled trial.

A Sentence in an Abstract of an Article Reads: "Compared