Experimental control Psychology

July 28, 2016


Psychological Research and

For every confounded variable, there is a potential control. In one sense of the term, to control a variable is precisely to remove it as a confounded variable. This is called methodological control; it means a variable is "ruled out" as a confounded variable by the logic of the experiment.

What does the word "control" mean when used in the context of experimental design?

Most beginning students take the word "control" literally; they visualize a laboratory scientist holding some variable such as temperature steady. But physical control over variables is not always necessary. Methodological control can be achieved, sometimes, by merely measuring a variable. Then one can demonstrate there is no difference between two groups on that variable, or the difference is not in a direction that would cause trouble when interpreting the data.

How could the student have eliminated volume as a confounded variable in his research?

On some occasions, an experimenter controls a variable by holding it steady. In the example on the previous page, of a student testing how different types of music affected studying, if he had realized the volume of his recordings might be a confounded variable, he could have controlled this variable by making sure the volume was exactly equal on the two tracks.

Don't see what you need? Psych Web has over 1, 000 pages, so it may be elsewhere on the site. Do a site-specific Google search using the box below.

Source: www.intropsych.com

RELATED VIDEO
06 EXPERIMENTAL RESEARCH 2 CONTROL PROBLEMS David
06 EXPERIMENTAL RESEARCH 2 CONTROL PROBLEMS David ...
Control - Short Experimental Film - [HD]
Control - Short Experimental Film - [HD]
Controlled vs Experimental group
Controlled vs Experimental group
RELATED FACTS
Share this Post

Featured tweets