Dr. Meta Van Den Heuvel, a pediatric fellow at the Hospital for Sick Children in Toronto, compares the results of the Nipissing District Developmental Screen (NDDS), a measurement tool strongly recommanded by the Ontario government for identifying developmental problems, with the Infant Toddler Checklist (ITC), a validated questionnaire designed to detect communication problems and autism. Her research challenges the sensitivity an specificity of the former tool, suggesting that it may not identify certain children who could benefit from early interventions.