Researchers hypothesized that stress was a risk factor for depression among college students. the correlation between stress and depression that they found in their cross-sectional study was consistent with the hypothesis. which is a possible threat to the internal validity of this study?

Match the item to the definition: indirect correlation, correlational research, correlational research, covary, pearson correlation coefficient, pearson correlation coefficient, direct correlation a. used to describe the relationship between two or more naturally occurring variables b. determines whether scores on the two variables covary c. whether two variables vary or change together d. denoted by the symbol "r" e. provides information about the sign (direction) and magnitude(strength) of the linear relationship. f. when the correlation is positiveg. when the correlation is negative