Correlation Studies

Correlation studies are used to look for relationships between variables in an experiment. "The correlation between two variables is how closely the two vary together and how well one predicts the other" (Van Wagner). There are three potential results such as a positive correlation, negative correlation, and no correlation. A positive correlation is when both variables either increase or decrease and represented by a positive graph. A negative correlation is when one of the variables in an experiment increases while the other decreases is represented by a negative graph. No correlation is represented by a scatterplot which is when there is no relationship between either variables.
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"Correlation allows the researcher to investigate naturally occuring variables that maybe unethical to test experimentally. However, correlation studies do not allow the researchers to go beyond the data that is give" (Correlation Method).

Sources:
Van Wagner, K. Psychology Research with Correlation Studies. Retrieved November 4, 2008, from About.com: Psychology
Web site:http://psychology.about.com/od/researchmethods/a/correlational.htm

Correlation Method. Retrieved November 4, 2008, from Correlation Method
Web site:http://www.simplypsychology.pwp.blueyonder.co.uk/correlation.html