PLACEBOS are everywhere. Drugs firms sell red pills because customers are convinced that they are stronger than white ones. Pressing the button at some pedestrian crossings makes no difference to when the green man appears, but makes us feel proactive. And the “doors close” request in a lift serves no purpose other than to soothe the frustration of impatient riders.

Add another placebo to the list: thermostat controls in hotel rooms. An investigation by the Wall Street Journal has confirmed what many of us already knew deep down: “It’s not your imaginations. Hotel thermostats often aren’t under your control.”

The Journal reports:

The humble hotel wall thermostat, once just a mechanical temperature sensor and fan-speed switch,…Continue reading