Question

Answer the following parts:

Aerobic dancing study:  A researcher wants to know which exercise program is more effective in reducing body mass index (BMI) in 60 to 70 year-old individuals with diabetes: 1) a 20 minute aerobic dancing program or 2) a 20 minute walking program. The participants in the research project will be 60 volunteers living in a large gated retirement community. Participants will be randomly assigned to either the aerobic dancing group or the walking group. Participants will exercise for 20 minutes a day three days a week for six months. Participants will have height and weight measurements taken (in order to calculate BMI) before and after this six-month program. Changes in BMI between the two groups will be compared.

Part 1) In the aerobic dancing study, which is the dependent variable?

a) exercise program

b) walking program

c) body mass index

d) retirement community

Part 3) Changes in BMI between the two groups will be compared. In the aerobic dancing study, which is the independent variables? (multiple answer allowed)

a) body mass index (BMI)

b) retirement community

c) aerobic dancing program

d) walking program

Part 2) Changes in BMI between the two groups will be compared. What is the best description of the most appropriate research design for this study?

a) pretest-post test quasi-experimental

b) pretest-post test true experimental

c) post test only quasi -experimental

d) post test only true experimental

Answer 1

• Part 1 (c) Body mass index.
• Part 2 (b) Pretest-posttest true experimental
• Part 3 (b) retirement community, (d) walking programme.