Quick Answer: Is A Control Group Always Necessary?

What is a control group example?

The control group (sometimes called a comparison group) is used in an experiment as a way to ensure that your experiment actually works.

Your experimental group would be given the Gatorade and your control group would be given regular water.

The conditions must be exactly the same for all members in the experiment..

Does qualitative research have a control group?

In practice however, qualitative researchers do operate with lesser degrees of control (Hammersley, 1992). Data collection methods such as structured interviewing and focus groups inhabit a ‘no man’s land’ between naturalism and control.

How does a control group increase validity?

Proper control groups and experimental controls maintain internal validity, because they reduce the probability that explanations other than the independent variable exist for changes in the dependent variable. … To be able to make such a causal claim, a true experiment would be required.

Which people are in the control group?

The control group is composed of participants who do not receive the experimental treatment. When conducting an experiment, these people are randomly assigned to be in this group. They also closely resemble the participants who are in the experimental group or the individuals who receive the treatment.

How do you identify a control group?

A control group in a scientific experiment is a group separated from the rest of the experiment, where the independent variable being tested cannot influence the results. This isolates the independent variable’s effects on the experiment and can help rule out alternative explanations of the experimental results.

Why is it important that an experiment include a control group?

Why is it important that an experiment include a control group? Without a control group, there is no basis for knowing if a particular result is due to the variable being tested or to some other factor. … If it is unknown which group subjects are in, it is less likely that results can be tampered with.

Does the control group stay the same?

What is the difference between a control group and an experimental group? An experimental group, also known as a treatment group, receives the treatment whose effect researchers wish to study, whereas a control group does not. They should be identical in all other ways.

Which study design does not require a control group?

A quasi-experimental research design is the use of methods and procedures to make observations in a study that is structured similar to an experiment, but the conditions and experiences of participants lack some control because the study lacks random assignment, includes a preexisting factor (i.e., a variable that is …

What happens when there is no control group?

In the absence of a control group, the researcher’s ability to draw conclusions about the new drug is greatly weakened, due to the placebo effect and other threats to validity.