Ages and Stages Questionnaire
Ages and Stages Questionnaire (ASQ) · Also known as: ASQ, ASQ-3
The Ages and Stages Questionnaire (ASQ-3), third edition, developed by Jane Squires and Diane Bricker in 2009, is a parent-completed developmental screening tool designed to identify children aged 1 month to 5.5 years at risk for developmental delay. It is brief, economical, and well-suited for population screening in primary care, early intervention programs, and community settings.
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When to use it
The ASQ-3 is recommended for universal screening of children 1 month to 5.5 years, particularly in well-child visits, Early Head Start and Head Start programs, childcare facilities, and pediatric clinics. It is ideal for population-level surveillance when professional assessment is unavailable or not feasible. Less appropriate for children with known significant disabilities or severe sensory impairments where parent report may be less valid.
Strengths & limitations
- Brief, parent-completed, and low-cost, making it practical for large-scale population screening.
- Validated across diverse cultural, ethnic, and socioeconomic groups internationally.
- Five developmental domains provide comprehensive coverage of early development without excessive length.
- Multiple age-specific forms (21 intervals) enable repeated screening throughout early childhood.
- Strong evidence base supporting sensitivity and specificity for identifying children needing evaluation.
- Parent engagement in monitoring child development promotes family awareness and involvement in early care.
- Relies on parent report, which may be biased by parental education, stress, or unfamiliarity with developmental norms.
- Less comprehensive than direct assessment; positive screening results always require confirmation with formal evaluation.
- Cannot be administered reliably to parents with limited literacy or non-English speakers without professional translation and interpretation.
- Social-emotional domain (ASQ-SE) has lower psychometric properties than developmental domains.
- Limited utility in children with severe motor, sensory, or communication impairments affecting parental observation.
Frequently asked
How accurate is the ASQ for detecting developmental delays?
The ASQ-3 has reported sensitivity of 80–86% and specificity of 85–90% for identifying children with developmental delays; however, performance varies by domain and population. Positive results should always be confirmed with comprehensive evaluation.
Can I use one ASQ form for children of different ages?
No. The ASQ has age-specific forms designed for 21 different age intervals. Using the wrong age interval will reduce screening accuracy. Select the form matching the child's current age.
What should I do if a child scores in the monitoring zone (borderline)?
Children scoring in the monitoring zone are observed over 4–8 weeks with repeat ASQ administration. If scores remain low, proceed with referral for comprehensive evaluation. If scores improve, continue routine screening at the next interval.
Is the ASQ appropriate for children with autism or other developmental disorders?
The ASQ can identify children with delays, but it is not diagnostic for specific conditions like autism. Positive screening results warrant referral for disorder-specific assessment such as the ADOS or other diagnostic tools.
Sources
- Squires, J., & Bricker, D. (2009). Ages & Stages Questionnaires (ASQ-3): A parent-completed child monitoring system (3rd ed.). Paul H. Brookes Publishing. ISBN: 978-1598571929
- Squires, J., Bricker, D., & Twombly, E. (2018). Ages & Stages Questionnaires: Social-Emotional (ASQ-SE-2): A parent-completed assessment tool. Journal of Developmental & Behavioral Pediatrics, 39(8), 635-643. link ↗
How to cite this page
ScholarGate. (2026, June 3). Ages and Stages Questionnaire (ASQ). ScholarGate. https://scholargate.app/en/developmental-assessment/ages-stages-questionnaire
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