Given that the original intent of the survey is for VFR flight, does the person who set the questions not understand the use of the instrument scan.
We have an altimeter or two that help us judge things. Add to that our stereoscopic vision gives us perspective.
A computer-generated 2d image of dubious quality does not equate to real-world conditions and removes most of the cues we use on each and every flight.
Sorry, but I don't think there is enough information available in the survey to make meaningful judgements. But I would like to see the conclusions they offer.