Im interested in “how children with severe autism experienced the receipt of sp

Im interested in “how children with severe autism experienced the receipt of sp

Im  interested in “how children with severe autism experienced the receipt of special education assistance in public school, this population is characterized by underdevelopment of social cognition, social skills, and language skills. What is the best method for collecting data to answer the research question?   Can you help me  identify and describe  the research design; how many children should be included in the study and why/what are the factors considered in making this determination. Thanks