Question

independent practice
a researcher wants to know how a new diet affects weight loss compared to a standard
diet. she recruits 80 subjects, then groups the subjects into 40 pairs based on their age and
gender. each participant is matched with a similar participant in the other group.
which term best describes the model selected for this study.
randomization
it is an experiment.
matched pairs design
block design

Explanation:

• Randomization refers to randomly assigning subjects to groups, which is not described here.
• While it is an experiment (as there is an intervention - the new diet), the more specific term based on the description of pairing subjects is needed.
• Matched Pairs Design is when subjects are paired (here based on age and gender) and each pair has one in each treatment group (new diet vs standard diet).
• Block Design is more about dividing into blocks (groups) but not specifically paired as described.

Answer:

Matched Pairs Design