Hi Lboro
I've just completed your survey and in my opinion you can possibly make it a little more indepth. ATC and aviation is incredibly complex and Human Factors play an enormous roll. To the point where IATA have designed courses purely to highlight human factors.
The kind of questions I think you could add are:
At what period do we feel most inclined to be negatively affected by human factors?
Looking at the human factors model, is there anything we see that could result in human factors contributing to an accident or incident?
You know? That typical kind of stuff...
Just my bit, good lukc, hope you ge a tonne of responses