An account of the development of the Checklist for Early Signs of Developmental Disorders (CESDD), designed for use within child care centers, the screening procedure for early signs of developmental disorders, and a study of the psychometric properties of the CESDD as a screener for autism spectrum disorders in a general population of infants and toddlers attending child care centers, based on data from 6,808 children from 70 different child care centers in Flanders, Belgium