Question

A new physical therapy is being tested in an experimental setting to see if the new methods reduce the recovery time for patients who recently underwent surgery for a torn ACL, a ligament in your knee. To do this, the researchers in the study first performed intake on participants by observing their Body Mass Index (BMI) and had them take a survey to describe their diet and their exercise habits. Then, the participants were split into three groups: the first group received no physical therapy, the second group received traditional physical therapy, and the third group received the new experimental physical therapy. Identify the response variable in this experiment. O Diet and Exercise Habits Recovery Time Physical Therapy Type Patient BMI

Answer 1

Recovery Time.

Explanations:

What is an experiment?

An experiment is a controlled scientific study of specific variables. These variables can take on different values.

For any experiments, there must be at least two variables:

• A manipulated and;

,

• A responding variable

A manipulated variable is a variable that is changed by the researcher and it is also called the independent variable.

The response or dependent variable is what the researcher is studying. It is what the researcher predicts will change if the manipulated variable changes.

From the given experiment, we are asked to identify the response variable that is, to identify what the researcher is studying. In this case, it is "the recovery time for patients who recently underwent surgery for a torn ACL".

Hence, we can conclude that the response variable in the experiment is the Recovery Time.