Researchers compared large student dormitories with smaller ones over a number of weeks. In the first three weeks, residents in the bigger dorm became ‘more competitive and reactive’, but by Week Seven they had mostly stopped interacting and had withdrawn in to their own rooms. In contrast, residents of the smaller dorms socialised in communal areas and were not competitive.
We retreat to private spaces when sharing with a large number of people because social encounters are hard to predict, more likely to be unwanted, and are difficult to avoid. In other words, there is less personal control over whom you have contact with and when. Ultimately, this feels threatening and uncomfortable. Over time it can cause stress-related physical and mental health problems