A researcher records the amount of time (in minutes) that parent-child pairs spend on social networking sites to test whether they show any generational differences. From the following findings reported in APA format, interpret these results by stating the research design used (repeated measures or matched pairs), the sample size, the decision, and the effect size.
Parents spent significantly less time on social networking sites compared to their children (MD = −42 minutes), t(29) = 4.021, p < .05, d = 0.49.