The problem with motion detection
Motion detection mechanisms are quite common nowadays, especially in public toilets and WCs. Light goes on automatically when you enter the WC, water goes on when you place your hands under the tap, and so on.
But I don’t think that works, UX-wise. Why? Let me explain.
Let’s say you’ve got a toilet cubicle with a motion detection mechanism to turn on the light. If the mechanism is not properly placed, it will really be the last thing you try: You go in the room, you search automatically around for visible switches, you find none, you wiggle around a bit more, maybe even leave the place and come back again, and finally you shrug, deciding that oh well, what has to be done has to be done, even in the dark. And tada! You enter the cubicle, light goes on. Leaves you baffled (and relieved).
Now let’s take the other example, one of my favourites: let’s say you have a tap with motion detection. You see it, see no visible way of controling it, no stickers around. You try turning it (I know I’ve done that many times) but it won’t work. You look for buttons on the wall or on the floor, ’cause hey, you’ve seen that around, but there are none. No visible way of controlling a tap. What would you do? I’ve left. Many times.
So the problem with motion detection is exactly this: They usually are planted in the last place you’ll ever check. Getting your hands under a tap without turning it on somehow is really the last resort, not the first thing in your mind.
I know that motion detection systems are a great way of ensuring economy both in use of power and water, but sometimes, the fanci-ness of it all really gets on my nerves.



