Dr. sparrow is a social psychologist who studies romantic relationships. several researchers have found that there is a link between income and marital satisfaction (e. g., dakin & wampler, 2008). dr. sparrow is curious as to whether there is a causal link between the two variables, such that having a higher income causes higher levels of marital satisfaction. he is confident that he cannot reasonably or ethically manipulate people’s income level, so he decides to use a multivariate design. he is also curious as to whether there is a causal link between these two variables or if two other variables (number of arguments and life satisfaction) can explain the relationship. he measures his three variables in a sample of 124 married couples recruited from a local community center. below are his results. dv: marital satisfaction variable beta (b) significance ( p) income .69 .03 number of arguments –.73 .01 life satisfaction .13 .81 refer to research study 9.2 to answer the following four questions. which of the following is not a predictor variable in dr. sparrow’s study?
a. income
b. life satisfaction
c. marital satisfaction
d. number of arguments 0