Global Scales for Early Development (GSED) 2.0 - Development of population norms for early childhood development under 36 months

The primary aim of this study is to develop a global age-normed distribution of GSED scores for how children 0-<36 months can develop. A secondary aim is to use these norms as reference to set standards for on- and off- track development for a given age at the population and programmatic level. Another secondary aim of this study is a preliminary attempt to create adjustments for accurate measurement of child development in moderate and late preterm infants on this distribution.