I found this recently-published article, Children who are bullied suffer worse long-term mental health problems than those who are maltreated interesting. Here are some excerpts:
A new study published in The Lancet Psychiatry shows that children who have been bullied by peers suffer worse in the longer term than those who have been maltreated by adults.
The research is led by Professor Dieter Wolke from Warwick's Department of Psychology and Warwick Medical School. The study is due to be presented at the Pediatric Academic Societies (PAS) annual meeting in San Diego on Tuesday 28 April.
[...] Professor Wolke said: "The mental health outcomes we were looking for included anxiety, depression or suicidal tendencies. Our results showed those who were bullied were more likely to suffer from mental health problems than those who were maltreated. Being both bullied and maltreated also increased the risk of overall mental health problems, anxiety and depression in both groups."
An abstract and full article (pdf) are available.
(Score: 4, Insightful) by wisnoskij on Monday May 04 2015, @05:10PM
Even the "new kid" is far from random. It implies that their parent(s) are not settled and shuffle the kid around (while ignoring there need to have a settled life while static friends). I think we could find a lot of non random variables in what makes up a "new kid".