Complex sentence: They solved this problem by selecting control group households from areas that did not broadcast the show, Mielke reported that future large-scale studies, instead of using groups of viewers and nonviewers, used statistical designs and methods for estimating cause-effects relationships.
Split into simpler sentences: They solved this problem by selecting control group households from areas that did not broadcast the show. Future large-scale studies, instead of using groups of viewers and nonviewers, used statistical designs and methods for estimating cause-effects relationships.