An only child is someone who has no siblings. There are many alternative terms for an only child, such as solo child, lone child, or single child. Additionally, some people refer to an only child as a "one and done" child or refer to them as having "singleton" status. Only children are often falsely associated with being spoiled or selfish, but research has shown that they are no different from children with siblings when it comes to socialization and development. In fact, only children may have some advantages, such as having more one-on-one attention from parents and developing stronger relationships with peers and adults.