I think my nephew has this. The basic idea is they have low sensory perception and are not sufficiently copying adults' behavior, specifically communication.

I think my nephew has this. The basic idea is they have low sensory perception and are not sufficiently copying adults' behavior, specifically communication. Diet and therapy are working. Certain foods made him worse, specifically gluten. On day-1 the therapist determined his range of perception: he had no peripheral vision and could only see a about 5-feet forward also he had auditory perception issues. Therapy is conducted within his perceivable range (which is increasing) and its objective is to get him to copy the therapist's behavior. The professions involved are occupational therapists and speech-language pathologists.