The ABC test for autism is a psychological scale that tests whether a child has symptoms of autism. For example, if the child has delayed speech and language development or poor intellectual development, if the child has a lack of interest, if the child is particularly withdrawn, unwilling to communicate with others, unwilling to play with other children, not dependent on their parents, and unable to communicate emotionally with their parents. The results of the ABC measure of autism can indicate not only whether the person is autistic or not, but also the severity of autism.