On a moderately crowded train, I've just woken up after dozing off, but I can't remember where I am or where I'm going. Apart from the noise of the moving train, it's quiet, and the other passengers are half asleep, fiddling with their phones or spacing out.

I realize I was supposed to get off somewhere ... but where? At the next station, passengers disembark. We start moving again. As the train picks up speed, I feel increasingly nervous. Should I get off at the next stop? The train comes to a slow halt, and some people rise and head for the doors. I feel compelled to follow. I'm on a station platform, but at which station? Where am I?

This is what unfolds in one of the virtual reality dementia simulations created by Silver Wood Corp., which operates apartment complexes for the elderly.