Sibling rivalry is the jealousy, competition, and fighting between brothers and sisters.
Sibling abuse is the most common but least reported abuse in the family.
Prevalence is higher than spousal or child abuse combined with consequences well into adulthood similar to parent-child abuse.
Up to 80 percent of youth experience some form of sibling maltreatment; yet, it's been called the forgotten abuse.
Therapists also frequently overlook it.
Usually, the perpetrator is an older child (o.