Q and the LCD screen

I was at the store playing with the Q and I wanted to know if this is normal or if i can change this.

When I was composing a picture of a slightly dark area the LCD screen would get brighter. On the other hand if the scene was too bright the LCD would darken. Basically the LCD screen wasn't showing me the exposure of the scene based on my selection of Aperture, Shutter speed and ISO. I thought the benefit of composing with an LCD screen was to have real time feed back of what your final output would look like.