Problem: Dr. Hancock conducts a study testing whether a new drug developed to treat generalized anxiety disorder works better than the new drug used for treatment of cognitive behavioral therapy (CBT). The participants are randomly assigned to either the drug condition or the CBT condition. After 4 weeks of treatment, all participants complete the Generalized Anxiety Test (GAT). The data reveal that the participants in the drug condition had lower GAT scores (i.e., less anxiety) than the participants in the CBT condition did. Dr. Hancock concludes that the new drug caused less anxiety. In this study, the predictor variable is: treatment type. the GAT score. anxiety. the new drug. Need Assignment Help?