Problem: The following is modified from the abstract of an article (Debono & Klein, 1993). Subjects who were high in dogmatism read a message from either an expert or nonexpert source who sup- ported his position with either strong or weak argu- ments. Strong arguments were more persuasive than weak arguments. Subjects were persuaded by strong arguments when the source was not an expert, but they were equally persuaded by strong and weak arguments when the source was an expert. 1. What was (were) the independent variable(s) and levels (of each)? 2. What was (were) the dependent variable(s)?