Validation of the Early Development Instrument for children with special health needs

Area of Science:

• Child Development
• Educational Psychology
• Public Health

Background:

• Population-level data on children with special health needs (CSHN) are crucial for developing effective educational, health, and service delivery strategies.
• The Early Development Instrument (EDI) is a tool used to measure early childhood development, but its applicability to CSHN requires validation.

Purpose of the Study:

• To determine if the EDI yields reliable and valid results for kindergarteners with special health needs, comparable to typically developing children.
• To examine the psychometric properties of the EDI when applied to CSHN.

Main Methods:

• Analysis of a large dataset (29,692 children) from Canadian provincial EDI implementations (2004-2014).
• Examination of item and domain characteristics, internal consistency, and score distributions.
• Construct validation through correlation with gender and age, and confirmatory factor analysis of the EDI's factor structure.

Main Results:

• The EDI demonstrated similar performance in terms of item and domain characteristics for CSHN compared to typically developing children.
• Boys generally scored lower across EDI domains, and a positive, though non-significant, trend was observed between age and EDI scores.
• Confirmatory factor analysis indicated that the EDI's original factor structure fit the data well for CSHN, similar to typically developing children.

Conclusions:

• The findings support the validity and interpretability of the EDI for children with special health needs.
• This validates the use of EDI data to inform and enhance strategies for special education, health, and service delivery for CSHN.
• The study advocates for increased utilization of EDI data for this often-overlooked population.