What is CREDI?
The Caregiver Reported Early Development Instruments (CREDI) is an open-access measure of early childhood development from Harvard's Graduate School of Education. It was designed to be answered by a caregiver — no clinician required — so that large populations of young children could be described affordably, including in low- and middle-income settings where formal assessment is scarce.
It was validated across seventeen countries with data from more than fourteen thousand children, which makes it one of the broadest cross-cultural references Learning Curve draws on.
How it is structured
The Long Form groups items into three developmental territories — Motor, Language / Cognitive, and Social-Emotional — across roughly birth to three years. Each item is a plain question a parent can answer about behaviour they have seen, and each sits in an age band where children typically begin to show it.
An honest note on the timings
CREDI's full published normative tables are not openly redistributed. The age windows shown here are age-band midpoints — close enough (within a few months) to tell whether frameworks agree about when a behaviour emerges, but not the precise item-response norms. Where Learning Curve needs finer precision, it leans on sources whose full norms are public, such as the Stanford dataset and the WHO motor windows.
Why it is in Learning Curve
CREDI adds cross-cultural breadth. When it and other normative sources agree that a behaviour appears at a certain age, that agreement is what Learning Curve treats as a real, universal developmental signal rather than one culture's expectation.