Can developmental screening tests identify children who are developmentally at risk?

Area of Science:

• Pediatrics
• Developmental Psychology
• Screening Tools

Background:

• Developmental screening tests are crucial for identifying children at risk for developmental delays.
• The Denver Developmental Screening Test (DDST) is widely used but has questionable validity.
• Concerns exist regarding the reliability and accuracy of available developmental screening instruments.

Purpose of the Study:

• To evaluate the validity and reliability of the Denver Developmental Screening Test (DDST).
• To assess the sensitivity and specificity of the DDST in identifying children with developmental risks.
• To present alternative screening tests with superior psychometric properties.

Main Methods:

• Review of over a dozen studies examining the concurrent and predictive validity of the DDST.
• Analysis of DDST performance across various demographic and temporal factors.
• Comparison of DDST psychometric properties with alternative developmental screening tools.

Main Results:

• The DDST demonstrates excellent specificity but consistently poor sensitivity, leading to underreferral.
• Studies indicate the DDST underrefers children at a nearly 2:1 ratio.
• Alternative screening tests with more optimal psychometric properties are available.

Conclusions:

• Caution is advised when using the DDST for predicting developmental problems due to its high underreferral rate.
• Developmental screening tests must possess acceptable sensitivity and specificity for reliable risk prediction.
• Further research and adoption of validated screening tools are necessary for accurate early detection of developmental delays.