I filled in the survey which seems very brief.
In all my years of working with horses full time, I have only ever had one yearling (TB) start to crib and he was turned out with his peers 24/7 at the time of him starting. This habit went from 0 - 10'in 24 hours.
I have had several horses come to me that had vices, mainly box walking, weaving and cribbing. I found all decreased greatly, some to the point of stopping with their environment. This was a big open barn, all stables had 3'6" walls with vertical bars above, they could see all that was going on. The barn was light and airy.
The young horses were housed in a loose pen on that barn, they had plenty of room to move around and play. They loved it as when it was pouting with rain they would, when the door was opened for them to go out in the fields, walk out, turn and come back inside.