The EDI is a short questionnaire completed by kindergarten teachers across Canada and internationally which measures children’s ability to meet age appropriate developmental expectations.

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News & Events

McMaster Psychiatry Research Day 2018

McMaster University’s 30th annual Psychiatry Research Day took place on May 2, 2018 at Mohawk College. This year’s theme was Risk and Resilience in Child and Youth Mental Health.

Offord Centre and EQAO collaborating to understand student trajectories

The EDI team is excited to announce a new collaboration with the Education Quality and Accountability Office (EQAO) to understand trajectories of student learning and well-being—from early childhood to adolescence.

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Latest Reports

Australian study shows early association between maltreatment and development

February 22, 2018

The long-term effects of childhood maltreatment are well known. It increases the risk of mental health problems, crime, and violence. But research has mostly looked at outcomes in middle childhood and adolescence, overlooking early childhood.

Does a mother’s sleep during pregnancy affect children’s development?

January 26, 2018

Sleep is incredibly important for children’s development. Getting 11-12 hours of sleep a day is associated with healthy development. Whereas getting too little sleep is associated with a host of problems.

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Completed EDIs

The EDI information collected for five-year-old children in Canada since 2004

12 of 13

Provinces & territories

Canadian provinces and territories EDI has been implemented in


Of children vulnerable

The number of children vulnerable in at least one developmental domain





The number of children vulnerable in at least one developmental domain by gender

Global Reach

Countries in which the EDI
has been implemented: