Question

Holden and colleagues (1997) compared mothers' reported attitudes toward corporal punishment of their children from before to 3 years after having their first child. "The average change in the women's prior-to-current attitudes was significant, t(107)=10.32, p<.001" (The change was that they felt more negatively about corporal punishment after having their first child.) Explain this result to someone who is familiar with the t test for a single sample, but not with the t test for dependent means.