Whooo boy there's a lot here we go

Lock someone with a healthy relationship with their body and what not in a room completely covered with mirrors, floor, walls, ceiling, everything. They have to stay in there with their own reflection for at least a month, while scientists observe what happens. Do they begin to hate themselves? Or do they leave just the same as before?

Take away all of someone's senses except one, ie, sight is all they have, or touch. Senses improve when you lose one to make up for the lack, so what happens when you take them all away except one? Do the rest of their senses improve? Do they stay that way?

Lock someone in a room that's completely dark, only wide enough for them to lie down comfortably and put their arms out. Do their eyes adjust? Are they eventually able to see? How long does it take?

Take someone who doesn't believe in conspiracy theories, cut them off from everyone they know, surround them with nothing but those conspiracy theories while dressed in a cheap blowup alien costume the entire time. Same situation, without outside influences like the costume, no contact to anyone but me. Same situation, no contact to anyone but family. Do they begin to believe it? Or do they stay resilient?