Types of Variables
What is a controlled variable - This likely refers
to the independent variable, the variable that is manipulated in a
systematic way by the experimenter.
What is a uncontrolled variable - I have not heard of this term, but
it may refer to what is sometimes called a confounding variable - a
variable that may introduce errors in the results. Experimenters try
to eliminate confounding variables as much as possible.
What is a dependent variable - This is the variable that is being
watched and/or measured. We wonder if or how it is affected by the
What is a independent Variable - This is the variable manipulated by
the experimenter. The name is a little misleading. It is not truly
independent, but rather carefully controlled (related to you first
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Update: June 2012