Do studies of feral and isolated children indicate the need for all to have parent interaction to develop norm

Do studies of feral and isolated children indicate the need for all to have parent interaction to develop normally?Do studies of feral and isolated children indicate the need for all to have parent interaction to develop norm
Yes they do indicate a need. Not just for parental interaction, but interaction with other children. It is all essential for social and language development. Physical wise no, but for learning and speech and interaction yes. That is why these children have little or no speech and language. or understanding of language.