Placebo Buttons

I didn’t know this (via Neatorama)

Supposedly the pedestrian buttons on robots (traffic lights for foreigners) in the US don’t do anything and neither do the “Close Doors” buttons in elevators/lifts. I guessed the closed door button didn’t do anything as the interval between pressing the button and the doors closing always appears to be random.

I have seen that giving people a control for an aircon, even if it doesn’t do anything, completely changes what they think the?temperature?is.

The placebo affect is very cool…