There is no mention of a control group in the article. It isn’t clear if a control group was used or how participants would have been assigned if one was present.

reword this sentence to make it sound non- AI

The article does not provide information about the inclusion of a control group. It is not evident whether a control group was utilized or how participants would have been assigned in case a control group was involved.

make it sound like a 12th grader wrote it

The article doesn't say anything about a control group. I'm not sure if they even used one or how they would have decided who gets in if they did.