Correlation Discussion
Essay by bbrown1972 • November 18, 2012 • Essay • 928 Words (4 Pages) • 1,941 Views
Correlation Discussion
Describe at least two different methods of establishing correlation between variables and provide an example of each. According to the text, "There are four forms of Karl's Pearson's product-moment r. They are Pearson r, Spearman rho (rs), Point-biserial r(pb), and phi coefficient. Each method views variables not in isolation, but instead as systematically and meaningfully associated with, or related to, other variables. For example, using correlation coefficient which indicates the strength of association between two variables the (X,Y). it also describes correlation that reflects mutual relations between X and Y resembles a straight line also known as linearity. In addition, values of r of 1.0 (positive or negative) indicates a perfect linear relation, while 0 indicates that that neither X or Y can be predicted by a linear equation. In these types of cases when the r is positive then there is an increase in both X and Y. but if the r is negative it's only an increase in the X and a decrease in Y. Another method that's commonly used is the dichotomous variable also known as the discrete variable which has two separate parts. An example of this would be measuring sound waves but measured in two different parts one high and the other low.
Advantages/Disadvantages
The advantages of correlation are that it is used for research to be carried out either by using experiments or taking surveys. The major advantage is that a large number of people can be researched and the research conducted can have endless possibilities. In other words those who do participate in surveys answers will be relevant because it's based on the case subject's opinion. Disadvantages of correlation are that the research answers may be biased. This may lead to unbalance answers and results on the case study. This happens when people who are being survey don't answer the questions truthfully.
Reference:
Rosnow, R.L., & Rosenthal, R. (2008). Beginning behavioral research: A conceptual primer (6th ed.) Upper Saddle River,
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