Many children come to the hospital because they do not speak and do not listen to instructions. As knowledge of autism becomes more widespread, children with this type of problem are coming in at younger and younger ages. In clinical practice, there is a need to be alert to another specific developmental disorder that has a higher prevalence rate – receptive language disorder. Receptive language disorder is also known as receptive-expressive language developmental disorder. These children have many similarities to children with autism, such as: no response to familiar names at 1 year of age; inability to identify certain common objects at 18 months of age; impaired language comprehension and expression, such as not being able to say words at 2 years of age; inability to follow simple daily instructions; isolation from peers, narrow interests, self-talk, etc. Like children with autism, these children sometimes act as if they are deaf, and hyperactivity and shyness are evident; social interaction disorders are also common in these children until the age of 5. The difference between these children and autistic children is that they are able to interact with others using gestures and expressions and have imaginative play.