A feral child (also called "wild child "') is a human child who has lived isolated from human contact from a very young age where they have little or no experience of human care, behavior, or, crucially, of human language. Some feral children have been confined by people (usually their own parents), and in some cases this child abandonment was due to the parents’ rejection of a child's severe intellectual or physical impairment. Feral children may have experienced severe abuse or trauma before being abandoned or running away. Feral children are sometimes the subjects of folklore and legends, typically portrayed as having been raised by animals.
Feral children lack the basic social skills that are normally learned in the process of enculturation. For example, they may be unable to learn to use a toilet, have trouble learning to walk upright after walking on fours all their lives, or display a complete lack of interest in the human activity around them. They often seem mentally impaired and have almost insurmountable trouble learning a human language. The impaired ability to learn a natural language after having been isolated for so many years is often attributed to the existence of a critical period for language learning, and taken as evidence in favor of the critical period hypothesis.
There is little scientific knowledge about feral children. One of the best-documented cases has supposedly been that of sisters Amala and Kamala, described by Reverend J. A. L. Singh in 1926 as having been "raised by wolves" in a forest in India. French surgeon Serge Aroles, however, has persuasively argued that the case was a fraud, perpetrated by Singh in order to raise money for his orphanage. Child psychologist Bruno Bettelheim states that Amala and Kamala were born mentally and physically disabled. Yet other scientific studies of feral children exist, such as the case of Genie.