Online College Courses for Credit

4 Tutorials that teach Control and Variable Groups
Take your pick:
Control and Variable Groups

Control and Variable Groups

Author: Nathan Lampson

This lesson will explain the difference between a control group and variable groups, when using the scientific method.

See More
Fast, Free College Credit

Developing Effective Teams

Let's Ride
*No strings attached. This college course is 100% free and is worth 1 semester credit.

37 Sophia partners guarantee credit transfer.

299 Institutions have accepted or given pre-approval for credit transfer.

* The American Council on Education's College Credit Recommendation Service (ACE Credit®) has evaluated and recommended college credit for 32 of Sophia’s online courses. Many different colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.



Control and variable groups are used in order to test the hypothesis of an experiment. With the control group of an experiment, nothing is changed.  Control groups are used to measure the changes that are produced by testing a hypothesis.  While the control group stays the same, one thing is changed in the variable group in order to study the changes that are produced.


Independent Variable

When testing a hypothesis, the independent variable is the part of the variable group manipulated by the experimenter in order to monitor the effects.


Dependent Variable

The dependent variable is the experimental response to the presence or absence of the independent variable in an experiment.



My turtle will grow faster if I give it one extra hour of lamplight every day.  

A turtle that is the same size will be used as a control and will be given a normal amount of lamplight.

Control and Variable Groups