Consortium for Research on Early Childhood Development and Education (CORE)

Team Members

Prof RAO, Nirmala 

Project Information

The Hong Kong Early Child Development Scale (HKECDS) was developed based on the context of Hong Kong. This Scale is a population level assessment of early childhood development. It is not an IQ or achievement test, and individual decisions about children cannot be made based on results from the Scale.


Each Test Kit includes: an administration manual, test items including an easel, an exercise booklet and a scoring booklet.


In 2020, an iOS version of HKECDS is released for the purpose of standardizing the administration of the tools.

Publications and News​

Published articles

    • Rao, N., Chan, S. W. Y., Wang, R., Lee, D., Ng, R. Y. T., Becher, Y., Lau, C., Sun, J., Ho, F. K., & Ip, P. (2022). The Hong Kong Early Child Development Scale-3: A validation study. Asia-Pacific Journal of Research in Early Childhood Education, 16(2), 1–23.
    • Rao, N., Sun, J., Ng, S.N.N., Ma, K., Becher, Y., Lee, D., Lau, C., Zhang, L., Chow, C.B., & Ip, P. (2013). The Hong Kong early child development scale: a validation study. Child Indicators Research, 6(1), 115-135.


    • Rao, N., Chan, S. W. Y., Wang, R. K. Y., Lee, D. P. L., Ng, R. Y. T., Tung, K. T. S., Wong, R. S., Ho, F. K. & Ip, P. (2019). Development and validation of the Hong Kong Early Childhood Development Scale – Short Form (HKECDS-SF). Paper presented at the Joint Annual Scientific Meeting 2019 of the Hong Kong Paediatric Society, Hong Kong College of Paediatricians, Hong Kong Paediatric Nurses Association, & Hong Kong College of Paediatric Nursing, Hong Kong. [Oral presentation second prize]