Develop three comparative (paired comparison, rank order, and constant sum) scales to measure attitude toward five popular brands of toothpaste (Crest, Colgate, Aim, Pepsodent, and Ultra Brite). Administer each scale to five of them. None of them should be administered more than one scale. Note the time it takes each student to respond. Which scale was the easiest to administer? Which scale took the shortest time?