A researcher conducts a standard multiple regression analysis to predictdepression as a function of the following predictors: parental depression (sr squared = .25), number of annoying quizzes (sr squared = .15),and peer support (sr squared = .35). If the total variance accounted for in the dependent measure is 75%, what is the partial correlation squared for peer support?

1. .592 (i.e., squareroot(.35)).
2. .583 (i.e., .35 / .60)
3. Cannot be computed without knowing the shared variance.
4. .467 (i.e., .35 / .75)