The Caregiver Reported Early Development Instruments--Short Form (CREDI; McCoy, Waldman, & Fink, 2018) was developed as a tool for measuring the motor, cognitive, language, social–emotional, and mental health skills of children under age three in culturally diverse settings. The CREDI was developed using a multi-phase process that included (1) the development of a conceptual framework, (2) the development of an initial item set (based on literature review), and (3) four rounds of qualitative and quantitative pilot testing. As part of the larger project, both a short and a long form of the CREDI were developed from the same broad item set. Information on the long form will be presented in a separate paper. The CREDI’s short form, which is intended as a measure that can be integrated into household survey and monitoring efforts in order to provide a “snapshot” of overall ECD status at the population level. Items were back-translated into local languages. Results from children living in 17 low-, middle-, and high-income countries suggest that the CREDI short form is valid, reliable, and acceptable for measuring population-level early childhood development. The authors note several limitations (e.g., the large number of children from a wide range of cultural and linguistic contexts, country-level data) and discuss future research. (PsycTests Database Record (c) 2020 APA, all rights reserved)