To test the effect of a new drug on depression, we randomly...

To test the effect of a new drug on depression, we randomly assign people to control and experimental groups. Those in the experimental group take a pink pill containing the new medication; those in the control group take a pink pill that contains no medication. Which statement is true? a. The medication is the dependent variable. b. Depression is the independent variable. c. Participants in the control group take a placebo. d. Participants in the experimental group take a placebo.

To test the effect of a new drug on depression, we randomly assign people to control and experimental groups. Those in the experimental group take a pink pill containing the new medication; those in the control group take a pink pill that contains no medication. Which statement is true?
a. The medication is the dependent variable.
b. Depression is the independent variable.
c. Participants in the control group take a placebo.
d. Participants in the experimental group take a placebo.

Key Concepts

Random Assignment

Random assignment is a method used in experimental design to assign participants to different groups in a way that each participant has an equal chance of being placed in any group. This process helps ensure that the groups are comparable at the outset of the experiment, reducing potential bias and confounding variables, which enhances the internal validity of the study.

Experimental Group

The experimental group in a study is the group that receives the treatment or intervention being tested. Researchers observe and measure outcomes in this group to determine the effect of the intervention, providing data that can be compared against the control group.

Control Group

The control group is a baseline group that does not receive the experimental treatment or receives a standard treatment or placebo. This group is used for comparison purposes, allowing researchers to determine whether changes in the experimental group can be attributed to the intervention rather than other factors.

Placebo

A placebo is an inert substance or treatment that has no therapeutic effect and is used as a control in experiments. In studies involving medicinal interventions, a placebo is given to the control group to help isolate the effect of the active medication by controlling for participants’ expectations and other psychological factors.

Independent Variable

The independent variable is the variable that is manipulated by the researcher to observe its effect on other variables. In the context of experimental studies, this is the treatment or intervention that the researcher changes to see if it produces any change in the dependent variable.

Dependent Variable

The dependent variable is the outcome or response that is measured in a study. It is expected to change or be influenced as a result of manipulating the independent variable, serving as the primary data for assessing the effects of the intervention.

Transcript

Please give Ace some feedback