Question

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amir wants to know how images of violence affect individuals who are not routinely exposed to violent images. he is teaching two sections of a research methods course, so he exposes the students in one section to violent images and records their reactions. he exposes the students in the other section to nonviolent images and records their reactions. what approach is amir using to help validate his results?
a. he is conducting a controlled experiment based on past experiences.
b. he is creating a case study.
c. he is using a control group to help isolate the effects of violent images.
d. he is randomizing test subjects.

Explanation:

• Option A: There's no mention of basing the experiment on past experiences, so A is incorrect.
• Option B: A case study focuses on in - depth analysis of a single or a few cases, while here there are two groups (exposed to violent and non - violent images), so B is wrong.
• Option C: Amir has one group exposed to violent images (experimental group) and one group exposed to non - violent images (control group). The control group helps to isolate the effect of violent images by providing a comparison, so C is correct.
• Option D: The problem doesn't state that the test subjects are randomly assigned to the groups, so D is incorrect.

Answer:

C. He is using a control group to help isolate the effects of violent images.