SOPHIA will be down Wednesday, December 7, 2016 at 4:30 AM (CST) for a little housecleaning. We are sorry if this causes you any trouble. The outage should last less than 5 minutes.

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

Control and Variable Groups

Author: Nathan Lampson
Description:
This lesson will explain the difference between a control group and variable groups, when using the scientific method.
(more)
See More
Try a College Course Free

Sophia’s self-paced online courses are a great way to save time and money as you earn credits eligible for transfer to over 2,000 colleges and universities.*

Begin Free Trial
No credit card required

25 Sophia partners guarantee credit transfer.

221 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 20 of Sophia’s online courses. More than 2,000 colleges and universities consider ACE CREDIT recommendations in determining the applicability to their course and degree programs.

Tutorial

 

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.

 

Example:

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.