We need more peer reviewed studies on sibling abuse.
I suffered from sibling abuse for the first decade of my life. I was adopted as an infant (only 8–9 months old) and lived with my older brother (who was my adoptive parents biological child) for the first ten years of my life, and it was a living Hell for me. I was relentlessly verbally, mentally, and emotionally abused.
As a twenty-two year old, I should not have “blank spots” in my memory of my sibling and myself, because of how bad things got. I should not have sharp, distinct memories of pure terror because of how bad my older brother (who is eleven years older than me) terrorized me, using fear to make me cry and isolate myself.
We have a very small pool of sibling abuse studies. All of the peer review studies that I have read essentially say the same thing over and over again, because all of them use the same sources. It is estimated that at least one in five children with siblings go through psychological abuse by a sibling (source: tinyurl.com/jbpy6cb).
Some consequences that have been shown as a result of sibling abuse (for adult survivors) has been: symptoms of post-traumatic stress disorder (PTSD), anxiety disorders, depression, dissociative identity disorder (DID), eating disorders, angry outbursts, self harm, somatic complaints (aka complaints of bodily aches and pains), suicidal thoughts and feelings, and individuals are more likely to engage in risky activity (unprotected sex, join a gang, smoke cigarettes, drink alcohol, etc) (source: tinyurl.com/z2nltrt).
The ribbon for sibling abuse survivors is a dark green ribbon. The domestic violence survivors ribbon is a dark purple color. If you wish to learn more about sibling abuse, this website is great and provides a lot of information: http://siblingabuseresources.tumblr.com