Provide an appropriate response.
-A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She randomly
Assigns half of a group of overweight persons to a treatment group who are given the herb with instructions as
To use and a planned diet for six weeks. The other half of the group is given a placebo with the same instructions
And same diet. None of the participants know to which group they belong. A nurse at the nutrition center
Weighs each subject on Friday of each week. Identify any problems that are likely to cause confounding.
A)Method of assignment to treatment and control groups
B)Experimenter effect
C)The study is essentially free of potential confounding.
D)Placebo effect

Question

Quizplus · Accepted Answer

The study is essentially free of potential confounding because the participants are randomly assigned to the treatment and control groups, and neither the participants nor the nurse who weighs them knows to which group they belong. This helps to ensure that any differences in weight loss between the two groups are due to the herb, and not to other factors such as differences in diet or exercise.

Provide an Appropriate Response