Pearson Product-Moment Correlation Coefficient Written by Ari Julianto The term of Pearson Product-Moment Correlation Coefficient (usually symbolized r), or correlation coefficient mostly used in statistic. In educational research is used especilly to find out the correlation or relationship. Basically, Pearson Product-Moment Correlation Coefficient (sometimes referred to as the PPMCC or PCC, or Pearson's r) is a measure of the degree of linear relationship between two variables, usually labeled X and Y. While in regression the emphasis is on predicting one variable from the other, in correlation the emphasis is on the degree to which a linear model may describe the relationship between two variables. In regression the interest is directional, one variable is predicted and the other is the predictor; in correlation the interest is non-directional, the relationship is the critical aspect. The Pearson product-moment correlation coefficient is widely used in the sc...