It’s interesting to note that diagnosis of autism is very different among states, which might explain why diagnoses vary greatly amongst states. Data reported in 2012 shows that Iowa reported the lowest prevalence at 0.1% while Minnesota reported the highest rate at 1.2%. The IDEA evaluation features are also different from the state education agency criteria. The IDEA criteria of autism diagnoses includes academic, speech-language, intelligence (or psychological), social and emotional, health, vision, hearing, and motor skills.
