What type of research design is used here? Two researchers have designed a new tanning lotion guaranteed to tan the palest of pale swimmers. Long-distance swimmers are chosen for the new tanning group and short-distance swimmer are chosen for the old tanning group. The new group uses the revolutionary tanning lotion for 3 weeks and the old groups uses the most popular brand of tanning lotion for 3 weeks. After the treatment period, skin tones are rated considerably more tan in the new group. True Experiment. Non-Experiment