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Cara is running a study to examine the effect of music on mood. She randomly assigns participants to three conditions — rock, jazz, and country. She has the participants rate their mood with a short questionnaire, then listen to their assigned music for 20 minutes, and then fill out the mood questionnaire again. What kind of design is she using? Group of answer choices pretest/posttest posttest only repeated measures concurrent measures

Respuesta :

Answer:pretest/posttest

Explanation:

A pretest-posttest refers to a experiment in which individuals in a study participate before and after the experiment. This is done so that a researcher may examine if manipulation of the experiment changes the result obtained from the participants. In this design there is only one large group used for the experiment.

This is done to examine and establish if changing something can influence the participants. The manipulation is constant throughout all the participants since the participants are studied before and then after the manipulation of the experiment.

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