|
A placebo button is a push-button with apparent functionality that actually has no effect when pressed. Such buttons can be psychologically rewarding to pressers by giving an illusion of control. They are commonly placed in situations where it would have once been useful to have such a button but the system now proceeds automatically. In some cases the button may have been functional, but may have failed or been disabled during installation or maintenance or was, in a relatively small number of cases, installed to keep people contented, much in the same way as placebos. In many cases a button may appear to do nothing but in fact cause behavior that is not immediately apparent; this can give the appearance of it being a placebo button. == Walk buttons == Many walk buttons at pedestrian crossings were once functional in New York City, but now serve as placebo buttons. In the United Kingdom and Hong Kong, pedestrian push-buttons on crossings using the Split Cycle Offset Optimisation Technique may or may not have any real effect on crossing timings, depending on their location and the time of day, and some junctions may be completely automated, with push-buttons which do not have any effect at all. In other areas the buttons only have an effect during the night.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Placebo button」の詳細全文を読む スポンサード リンク
|