In 1957, Dr. Eunice Davis headed an in-depth study of 244 children in four Minnesota counties to determine their needs and better estimate the number of people requiring institutionalization.
Of the nearly 250 children originally identified, about half were evaluated and found to have cognitive disabilities, suggesting that misdiagnosis was a potential problem.
An in-depth study by Dr. Eunice Davis found that almost 50% of children with developmental disabilities could have been misdiagnosed.