The effect size of the difference in outrageousness between private and public conditions in terms of percent of variance explained is r^2=0.628.Why is that?

Dr. Dylan is interested in whether part of why we get 'outraged' at certain events has to do with whether an audience can witness our outrage or not (in other words, is there a 'Facebook effect' where people display more or less outrage on social media ns merely because of the audience). Dr. Dylan recruits 10 subjects and has them rate the 'outrageousness' of a list of events in a 'private' condition where no one else will learn es of the ratings and a 'public' condition where the ratings will be shared with others. ctor The same 10 subjects participate in both conditions in randomized order. Test Dr. Dylan's theory with a = .05. Here are his data ('outrageousness' scores): Condition 1 Condition 2 Private Public 5 10 11 8 N 8 4 8 12 15 13