28. In terms of treatment for the autistic child, an excellent indicator of prognosis is the: Ea. child's premorbid history b. child's language ability C. parents' willingness to cooperate with the treatment plan d. importance of preservation of sameness 29. Approxi mately what percent of autistic chi ldren improve enough by adulthood to hold down jobs and 1ive alone? a. 5% b. 20% c. 50% d. 75% 30. An autistic child is tested for concentrations of various neurotransmitters in her brain. It is likely wh ich of the following will be found? a. high levels of serotonin and dopamine b. low levels of serotonin and dopamine c. high levels of serotonin and low levels of dopamine d. low levels of serotonin and high levels of dopamine 31. Dwight has an 1.Q. of 30. He has lived his life in an institution but is a candidate for a communit y program. He cannot read but it is hoped that with extensive training he will be able to work in a sheltered workshop. What level of retardation does Dwight demonstrate? a. mild b. moderate C. severe d. profound