When you want to know which of the independent variables is a better predictor of the scores on the dependent variable, you would employ:

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When wanting to determine which independent variable has a stronger relationship with the dependent variable, multiple regression analysis is the best choice. This analysis allows for the inclusion of multiple independent variables to predict a single dependent variable, and can provide information on the unique contribution of each independent variable in predicting the dependent variable. Pearsons's Product Moment correlation and Spearman's rho are measures of association between two variables and do not account for the influence of other variables. A t-test for paired data is used to compare two means of a single group and would not be appropriate for comparing multiple independent variables.

When You Want to Know Which of the Independent Variables