Convergent Validity of Infant/Toddler Developmental Progress Monitoring Tools

Background Using progress monitoring data to make effective and timely decisions in early intervention (EI) requires high quality assessment. Infant/toddler individual growth and development indicators (I/T IGDIs) have been developed to be brief, reliable and engaging progress monitoring tools that are sensitive to change over short time periods (Greenwood et al. in J Early Interv 33:254–267, 2011. https://doi.org/10.1177/1053815111428467).