A researcher conducts an experiment to determine whether a daily cup of coffee (

Question

A researcher conducts an experiment to determine whether a daily cup of coffee (i.e., caffeine) will increase anxiety among college students. Each day, one group of participants was given a cup of caffeinated coffee, and a second group was given a cup of decaffeinated coffee (i.e., placebo). After 6-weeks, the researcher used Anxiety Questionnaire to assess anxiety levels of all participants. What is the dependent variable in the study?

A. A daily cup of caffeinated coffee given to one group. B. The anxiety scores of all participants in the study. C. The type of coffee given to each participant, caffeinated or decaffeinated coffee. D. The anxiety scores at the beginning and at the end of the study.

Explanation / Answer

We can use ,

After 6-weeks, the researcher used Anxiety Questionnaire to assess anxiety levels of all participants.

Option B) is correct.

B. The anxiety scores of all participants in the study.

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