Appendix F Autism and Mental Retardation Respond to the following List the primary features of autism. Lack of responsiveness, language and communication problems, limited imaginative play, very repetitive and rigid behavior, self-stimulatory behaviors, self-injurious behaviors, overstimulation of sights and sounds, and understimulation Which explanation for autism is no longer considered valid and lacks research support Sociocultural causes What forms of treatment are helpful for a person with autism Behavioral therapy, communication training, parent training, community integration, psychotropic drugs, and certain vitamins when combined with other approaches List the criteria for a diagnosis of mental retardation Well below average general intellectual functioning in combination with poor adaptive behavior, low IQ score of 70 or below, difficulty in areas such as communication, home living, self-direction, work, or safety, and the appearance of symptoms before the age of 18 Explain one way in which sociocultural biases in testing might pose problems for assessing mental retardation. Some people may receive the diagnosis partly because of cultural differences. Of the four levels of mental retardation, into which category do most people with mental retardation fall Approximately 85 of all people with mental retardation fall into the category of mild retardation. What are the main types