A multi-disciplinary team of early childhood specialists updated the content of the ndds checklist in 2011 to reflect current research in child development and to support changing norms. An item-by-item literature review was conducted with support from the Government of Ontario to ensure that all areas had the support of a high level of evidence.

An independent team of child development researchers, led by Dr. John Cairney and Dr. Jean Clinton from the Offord Centre at McMaster University, conducted a robust reliability and validation study of the updated checklists.

Evaluation of the revised Nipissing District Developmental Screening (NDDS) tool for use in general population samples of infants and children: 

The ndds checklist underwent a rebrand in 2018 with a new look, new parent-friendly name – the Looksee Checklist – but the same content as the 2011 update. The Looksee Checklist is not a standardized diagnostic screening test but has always been a surveillance tool to monitor early child development.

Other studies:

Concurrent validity of the Ages And Stages Questionnaires and Bayley Developmental Scales in a general population sample: