1. lack of training: the reason for children's language development retardation may be that they did not get timely language training during the critical period of language, which led to children's language development retardation.
2. Intellectual and emotional factors: Children may have mental retardation, which leads to a corresponding delay in language development. It is slower than normal children in all aspects of language development, which makes it difficult for children to communicate in interpersonal relationships and affects their understanding and expression of language.
3. Sensory integration disorder: Sensory integration disorder can also lead to language development retardation in children. There are three systems of sensory integration: touch, vestibular sensation and proprioception. Perhaps the child's vestibular sense disorder, the child can not judge, screen and filter the information input into the brain, which leads to the child speaking late, the language logic is not good, and the speech is upside down.
4. Environmental impact: Children's language retardation may also be caused by environmental factors. Because of the poor living environment or the lack of opportunities for exercise and education, parents rarely communicate with their children emotionally, which makes the baby lose the opportunity to learn a language.