a-clinical-trial-investigated-the-effectiveness-of-a-new-cognitive-behavioral-th

Question

A clinical trial investigated the effectiveness of a new cognitive behavioral therapy app for reducing symptoms of insomnia in young adults. Forty-two participants aged $20$ to $22$ with chronic insomnia were randomly assigned to use either the cognitive behavioral therapy app or a relaxation music app for six weeks. Sleep quality was assessed at the start and end of the study. What are the experimental units and the treatments in this experiment?

Accepted Answer

Experimental units: $20$ young adults with insomnia

Treatments: cognitive behavioral therapy app and relaxation music app for six weeks

Answer

Experimental units: cognitive behavioral therapy and relaxation music apps

Treatments: $42$ young adults with insomnia

Answer

Experimental units: sleep quality scores

Treatments: cognitive behavioral therapy app and relaxation music app for six weeks

Answer

Experimental units: $20$ young adults with insomnia

Treatments: sleep quality assessment

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