An experiment is designed to compare the differences in health outcomes between people who are visited in the hospital by therapy cats and people who are not. which of these is the independent variable?

B would be the choice I would go with. Let me tell you why

Explanation:

That is the independent variable because it would depend on if the person was visited by the therapy cat. For example, 6 patients out of 100 patients visited by the cat were sleeping; those 6 patients never saw, touched, or interacted with the cats. The sample could not include those 6 patients.

B. Whether a therapy cat has visited.

Explanation: In an experiment that is designed to compare the difference in health outcomes between people who are visited in the hospital by therapy cats and people who are not, the independent variable is whether a therapy cat has visited. What this experiment is designed to probe is if there is any difference in the patient's health outcome whether a therapy cat has visited or not. The health outcome is the dependent variable. The independent variable is the variable that is controlled in the experiment. The dependent variable is the variable that is being measured in the experiment.

she recieved a treatment not thought to be specifically effective in treating her disorder.

answer; epigenetics;