Dr. Grayson is interested in studying the relationship between weight loss and mood. To conduct the study, Dr. Grayson analyzes the results of several previous studies on weight loss and emotional state. Which research strategy is Dr. Grayson using?
Dr. Grayson is interested in studying the relationship between weight loss and mood. To conduct the study, Dr. Grayson analyzes the results of several previous studies on weight loss and emotional state. Which research strategy is Dr. Grayson using?