PSYC 300 Chapter Notes - Chapter 9: Statistical Significance, Spurious Relationship, Pearson Product-Moment Correlation Coefficient
2 Jun 2017
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Research methods for the behavioral sciences chapter 9. Point plotted for each individual at intersection of scores on each variable. Provide visual image of relationship between variables. Regression line - a straight line that minimizes the squared distance of the points from the line: linear relationships - when the association between the variables on the scatterplot can be easily approximated with a straight line. Positive linear relationship - when the straight line indicates that individuals who have above-average values on one variable also tend to have above-average scores on the other variable. Negative linear relationships - when the above-average values on one value are associated with below-average values on the other variable: nonlinear relationships - relationships between variables that cannot be well described with a straight line. Independent - being unable to use one variable to predict the other because no correlation exists.
