Crab
The two guys who set up the first Sea King sim back in 1970 (Test pilot Peter Harper and Jet Jock Peter Jago) did a lot of work on the question of scanning. It was before the technology to track eye movement was available so each would spend time lying on the interseat console whilst monitoring the pilot flying's eye movement. They were astonished to find that experienced pilots used peripheral vision to a far greater extent than previously realised.
The problem with today's flats screen digital displays is that many pilots coming from older generation helicopters have a huge problem with re-programming the brain to look, recognise, calculate and respond because with peripheral vision the brain relies on the needle position on a dial. No dial, no needle, just a number and your scanning process has to be modified as well as reprogramming your brain to deal with numbers.
G