Have you ever pressed the pedestrian button at a crosswalk and wondered if it really worked? Or bashed the "close door" button in an elevator, while suspecting that it may, in fact, have no effect whatsoever?
원문출처 : https://www.cnn.com/style/article/placebo-buttons-design/index.html
원문출처 : https://www.cnn.com/style/article/placebo-buttons-design/index.html