PSYC 3525 Chapter Notes - Chapter 11: Phi Coefficient, Contingency Table
21 Mar 2013
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Beginning behavioral research: a conceptual primer (7th ed. Correlation coefficient-- a single number indicating the strength of association between two variables (x and y) Linearity-- correlations that reflect the degree to which mutual relations between x and y resemble a straight line. Pearson"s r is a standard index of linear relationship, with the possible values running from -1. 0 to +1. 0. Continuous-- a value can fall between any two adjacent scores (e. g. , age) Dichotomous-- the variable is divided into two distinct or separate parts (e. g. , gender) Pearson r-- two continuous variables, such as the correlation of scores on the sat with gpa after 4 years of college. Point-biserial r ( )-- one continuous and one discreet variable, such as the correlation of subjects" gender with their performance on the sat. Phi coefficient ( )-- two discreet variables, such as the correlation of subjects" gender with their yes or.
