I think this Discovery News video is a really useful summary of a study that was reported on late last year.
video: https://www.youtube.com/watch?v=_LsaaUTyc2E
The study defined psychological maltreatment as "caregiver-inflicted bullying, terrorizing, coercive control, severe insults, debasement, threats, overwhelming demands, shunning and/or isolation" ("Childhood Psychological Abuse as Harmful as Sexual or Physical Abuse," http://www.apa.org/news/press/releases/2014/10/psychological-abuse.aspx).
At last, the light is coming on! Great to see this MourningDove, thanks for adding it to our resources :hug: