In your essay, you’d better specify the disability and its impact. For there are loads of disability types, like cognitive, physical, psychological. And if, f.e., a person has a physical disability, like not able to walk, that person can still be socially active when a person with autism will definitely experience the impact of disability on her/ his social life. I would recommend to define disability types and explain how they affect the development of a person: in a social, physical or psychological way. Here you can look for research on Disability types and afterward just add your conclusions.