A Sweetener Challenge? A research-methods re-do. One of the dieticians who administered the artificial versus natural sweetener taste test in last week's lab felt she could improve the research methods. She decided to re-do the study with a different design. She still wondered if people's ratings of artificial sweetener and natural sweetener differed, but she thought that having one group of people taste the artificial sweetener and a separate group of people taste the natural sweetener added too much error to the design. She argued she could reduce that error with a repeated measures design (within-subjects). She set up a booth at the Victoria General Hospital in Halifax. Again, people attending a diabetic clinic at the hospital were given free coffee, but this time each participant received two coffees, one sweetened with artificial sweetener and the other with natural sweetener. Each participant then rated both coffees. They drank 3 oz. of coffee sweetened with artificial sweetener in an unmarked cup and 3 oz. of coffee sweetened with natural sweetener in a separate unmarked cup. To counterbalance, the dietician made sure that half tasted the natural sweetener first, and half tasted the artificial sweetener first. After finishing each coffee, they privately