Originally Posted by pibbur who
The context is that he had moved back to his mother, stopped working, spent a whole year in isolation, seeing nobody, not even his mother, and playing games a lot. They see this as one part among several others, of a downward spiral compatible with a developing schizophrenia.

A psychologist said to me a few months ago that "there exist scientific studies that people in closed rooms come to very, very stupid decisions". He meant Sociophobia with this remark, but in our talk we agreed that this could be true for "closed rooms" political commissions as well. "New ideas only come in from the outside", we agreed to.

Sorr for the grammar, but I don't know right now how to put it into a better wording.

So, isolating one self too much can imho indeed cause "psychological problems".
And no doubt this can be used as a technique in prisons to get people into doing what the overseers and the torturers want, too.