대광고 고2 · 두 단계 비교 기준 5문항

A museum tested two ways of encouraging visitors to return. First, it compared visitors who received a map with those who received no map. The mapped group found more rooms, but the difference in return visits was small. The museum then divided the mapped group again. Some maps highlighted famous objects, while others invited visitors to choose a personal route and record why each stop mattered. Visitors using the second kind were more likely to return, even though both groups had received maps. The later comparison therefore did not ask whether maps were useful in general. It asked which kind of attention a map encouraged. A summary that contrasted maps with no maps could describe the first stage, but it could not explain the final difference. To account for that result, the summary had to preserve the second baseline: following a fixed list versus building a personally meaningful route.

A museum tested two ways of encouraging visitors to return. First, it compared visitors who received a map with those who received no map. The mapped group found more rooms, but the difference in return visits was small. The museum then divided the mapped group again. Some maps highlighted famous objects, while others invited visitors to choose a personal route and record why each stop mattered. Visitors using the second kind were more likely to return, even though both groups had received maps. The later comparison therefore did not ask whether maps were useful in general. It asked which kind of attention a map encouraged. A summary that contrasted maps with no maps could describe the first stage, but it could not explain the final difference. To account for that result, the summary had to preserve the second baseline: following a fixed list versus building a personally meaningful route.

A museum tested two ways of encouraging visitors to return. First, it compared visitors who received a map with those who received no map. The mapped group found more rooms, but the difference in return visits was small. The museum then divided the mapped group again. Some maps highlighted famous objects, while others invited visitors to choose a personal route and record why each stop mattered. Visitors using the second kind were more likely to return, even though both groups had received maps. The later comparison therefore did not ask whether maps were useful in general. It asked which kind of attention a map encouraged. A summary that contrasted maps with no maps could describe the first stage, but it could not explain the final difference. To account for that result, the summary had to preserve the second baseline: following a fixed list versus building a personally meaningful route.

A museum tested two ways of encouraging visitors to return. First, it compared visitors who received a map with those who received no map. The mapped group found more rooms, but the difference in return visits was small. The museum then divided the mapped group again. Some maps highlighted famous objects, while others invited visitors to choose a personal route and record why each stop mattered. Visitors using the second kind were more likely to return, even though both groups had received maps. The later comparison therefore did not ask whether maps were useful in general. It asked which kind of attention a map encouraged. A summary that contrasted maps with no maps could describe the first stage, but it could not explain the final difference. To account for that result, the summary had to preserve the second baseline: following a fixed list versus building a personally meaningful route.

A museum tested two ways of encouraging visitors to return. First, it compared visitors who received a map with those who received no map. The mapped group found more rooms, but the difference in return visits was small. The museum then divided the mapped group again. Some maps highlighted famous objects, while others invited visitors to choose a personal route and record why each stop mattered. Visitors using the second kind were more likely to return, even though both groups had received maps. The later comparison therefore did not ask whether maps were useful in general. It asked which kind of attention a map encouraged. A summary that contrasted maps with no maps could describe the first stage, but it could not explain the final difference. To account for that result, the summary had to preserve the second baseline: following a fixed list versus building a personally meaningful route.