Im not sure about the psychology of it other than added security. I've noticed all mine are more eager to feed since being moved into small tubs. My hatchling to about 300g are in small 6qt tubs and at about 400g I switch them to their adult 28qt tub. An in between size would be ideal but right now those are my only two sizes. None of mine are larger than 1200g so I'm hoping I won't need to make a rack with larger tubs as they get larger. As of right now, mine all feed very well, between every 4-7 days depending on size. Smaller enclosures definitely seem to keep mine more comfortable and stress free equaling better eating consistency.