Please see in the copied section of the article where a citation needed. Here one could use Royse, D. (2011). Research methods in social work, sixth edition. Belmont, CA: Brooks/Cole/Cengage. ISBN 0840032277; page 109 to support the statement. wanker
Controlled variables are also important to identify in experiments. They are the variables that are kept constant to prevent their influence on the effect of the independent variable on the dependent. Every experiment has a controlling variable, and it is necessary to not change it, or the results of the experiment won't be valid. --moved from top-- contrib by 22.214.171.124 on 20:42, 22 July 2010
I'm not fully happy with the statement "In a statistics experiment, the dependent variable is the event studied and expected to change whenever the independent variable is altered." Isn't it rather so that dependent/independent variables refer to the variables in the regression model used to fit the results? Here is an IMO better explanation:  One should be cautious with dictionaries as references. Isheden (talk) 10:12, 30 September 2013 (UTC)
Semi-protected edit request on 15 April 2015
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A independent variable is wrong. should be an independent 126.96.36.199 (talk) 14:37, 15 April 2015 (UTC)
Done, thanks! --ElHef (Meep?) 14:43, 15 April 2015 (UTC)