They also had a problem turning on the ceiling light in the rear of the mini van. See photo. This light looked like the front ceiling light, so they tried pressing on the lens, but that didn't work. Perhaps they weren't pressing hard enough. They tried banging it with their fist! It still didn't work. Maybe the light was burned out. Later, someone discovered that the rear light wasn't burned out. The driver could turn it on with a switch on the dashboard!
example is interesting because there are three problems.
First, there is no obvious switch to turn on the front ceiling light.
Most people do not expect to press on the lens to turn
on a ceiling light.
Second, the rear ceiling light which looked similar to the front
light wasn't designed to be turned on by pressing on its lens.
However, most people would assume that it would be turned on in
the same way.
And third, because people's natural tendency when a
button doesn't work is to press it again, harder,
the rear ceiling light could be damaged by pressing
on it too hard in a frustrated attempt to turn it on.
Copyright © Michael J. Darnell 1996-2010. All rights reserved.