The case study investigates whether mindfulness mediation can help college students perform better on exams. Forty-eight undergraduates were recruited and randomly assigned to either a meditation class or a nutrition class. For the two treatments, scores were measured on a verbal reasoning test both before the treatments and after the treatments. The test scores for the nutrition group showed no change, whereas the test scores for the meditation group improved from 460 before the treatment to 520 afterwards. This was a 16-percentile increase. Which of the following describes a possible difficulty with this study?
a. Confounding variables
b. Interacting variables
c. Ecological validity
d. All of the above
Question 2
The case study investigates whether mindfulness mediation can help college students perform better on exams. Forty-eight undergraduates were recruited and randomly assigned to either a meditation class or a nutrition class. For the two treatments, scores were measured on a verbal reasoning test both before the treatments and after the treatments. The test scores for the nutrition group showed no change, whereas the test scores for the meditation group improved from 460 before the treatment to 520 afterwards. This was a 16-percentile increase. This experiment involved what type of design?
a. Case-control design
b. Repeated measures design
c. Matched-pairs design
d. None of the above
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