What is the Ages and Stages Questionnaire?
What Is the Ages and Stages Questionnaire?
The Ages and Stages Questionnaire (ASQ) is a widely used developmental screening tool designed to identify whether young children are meeting key developmental milestones. Parents or caregivers complete a series of simple, age-specific questions about their child's abilities, and the results help determine whether the child is developing on track or may need further evaluation.
Developed by Dr. Jane Squires and Dr. Diane Bricker at the University of Oregon, the ASQ has become one of the most trusted and research-backed screening instruments in early childhood development. It is used in pediatric clinics, early intervention programs, childcare centers, and public health agencies across the United States and in more than 60 countries worldwide.
| Feature | Details |
|---|---|
| Full name | Ages & Stages Questionnaires |
| Current edition | ASQ-3 (third edition) |
| Age range | 1 month to 5½ years |
| Number of questionnaires | 21 age-specific intervals |
| Completion time | 10 to 15 minutes (parent), 2 to 3 minutes (scoring) |
| Developmental areas screened | 5 (communication, gross motor, fine motor, problem solving, personal-social) |
| Languages available | English, Spanish, French, and many others |
| Publisher | Brookes Publishing |
The ASQ stands out because it places parents at the center of the screening process. Rather than requiring a clinician to observe and test the child, the questionnaire draws on the parent's everyday observations. This approach is not only cost-effective but also produces highly accurate results, with sensitivity and specificity rates that meet or exceed professional standards.
ASQ Editions and Versions
The ASQ has evolved through three major editions since its initial release. Each update has improved accuracy, expanded the age range, and incorporated feedback from years of research and real-world use.
| Edition | Year Released | Key Improvements |
|---|---|---|
| ASQ (first edition) | 1995 | Original parent-completed screening tool |
| ASQ-2 (second edition) | 1999 | Revised cutoff scores, expanded normative data |
| ASQ-3 (third edition) | 2009 | Updated norms, improved illustrations, new questionnaire intervals, broader diverse sample |
ASQ-3 (Third Edition)
The ASQ-3 is the current standard edition and includes 21 age-specific questionnaires. It was normed on a diverse sample of over 18,000 children, making it one of the most rigorously validated developmental screeners available. Each questionnaire contains 30 developmental items plus an open-ended overall section where parents can note any concerns.
The third edition introduced clearer illustrations, simpler language, and revised cutoff scores based on updated research. These changes improved the tool's accuracy across different cultural and socioeconomic backgrounds.
Online and Digital Versions
In addition to paper-based questionnaires, the ASQ is available through ASQ Online, a web-based management system. This platform allows programs to send questionnaires electronically, automatically score results, generate reports, and track children over time. The online system is particularly useful for large-scale screening programs and pediatric practices managing high patient volumes.
Five Developmental Domains
Each ASQ-3 questionnaire evaluates a child's development across five critical areas. These domains cover the full spectrum of skills that children typically acquire during early childhood, providing a comprehensive snapshot of the child's developmental progress.
| Domain | What It Measures | Example Skills |
|---|---|---|
| Communication | Language and pre-language skills | Babbling, following directions, naming objects, forming sentences |
| Gross motor | Large muscle movements | Rolling over, sitting, walking, jumping, climbing stairs |
| Fine motor | Small muscle movements and hand-eye coordination | Grasping objects, stacking blocks, drawing, using scissors |
| Problem solving | Cognitive abilities and learning | Finding hidden objects, sorting shapes, completing puzzles, pretend play |
| Personal-social | Self-help skills and social interaction | Feeding self, playing with others, expressing emotions, dressing |
Communication
This domain assesses how well a child understands and uses language. For younger infants, questions focus on sounds, cooing, and responses to voices. As children grow, the questions shift to vocabulary size, sentence formation, and the ability to follow multi-step instructions.
Gross Motor
Gross motor questions evaluate large body movements that require coordination and strength. Examples include head control in infants, crawling and walking in toddlers, and running, jumping, and balancing in preschoolers.
Fine Motor
Fine motor skills involve precise hand and finger movements. The questionnaire asks about activities like picking up small objects, scribbling with crayons, turning pages in a book, and eventually writing or cutting with scissors.
Problem Solving
This domain looks at how a child thinks, learns, and solves problems. It covers skills such as object permanence, cause-and-effect understanding, matching, counting, and imaginative play.
Personal-Social
Personal-social questions focus on how a child interacts with others and handles self-care tasks. Topics include feeding, dressing, playing cooperatively, expressing feelings, and following social rules.
Age-Specific Questionnaire Intervals
The ASQ-3 includes 21 separate questionnaires, each designed for a specific age window. This structure ensures that the questions match the developmental expectations appropriate for the child's age. Each interval has a target age and a range that accounts for slight variations in when the screening takes place.
| Questionnaire | Target Age | Age Range (Window) |
|---|---|---|
| 2 month | 2 months | 1 month 0 days – 2 months 30 days |
| 4 month | 4 months | 3 months 0 days – 4 months 30 days |
| 6 month | 6 months | 5 months 0 days – 6 months 30 days |
| 8 month | 8 months | 7 months 0 days – 8 months 30 days |
| 9 month | 9 months | 8 months 0 days – 9 months 30 days |
| 10 month | 10 months | 9 months 0 days – 10 months 30 days |
| 12 month | 12 months | 11 months 0 days – 12 months 30 days |
| 14 month | 14 months | 13 months 0 days – 14 months 30 days |
| 16 month | 16 months | 15 months 0 days – 16 months 30 days |
| 18 month | 18 months | 17 months 0 days – 18 months 30 days |
| 20 month | 20 months | 19 months 0 days – 20 months 30 days |
| 22 month | 22 months | 21 months 0 days – 22 months 30 days |
| 24 month | 24 months | 23 months 0 days – 24 months 30 days |
| 27 month | 27 months | 25 months 0 days – 28 months 30 days |
| 30 month | 30 months | 28 months 0 days – 31 months 30 days |
| 33 month | 33 months | 31 months 0 days – 34 months 30 days |
| 36 month | 36 months | 34 months 0 days – 38 months 30 days |
| 42 month | 42 months | 39 months 0 days – 44 months 30 days |
| 48 month | 48 months | 45 months 0 days – 50 months 30 days |
| 54 month | 54 months | 51 months 0 days – 56 months 30 days |
| 60 month | 60 months | 57 months 0 days – 66 months 30 days |
For children born prematurely (before 37 weeks gestation), the ASQ-3 guidelines recommend using the child's adjusted age rather than their chronological age until 24 months. This adjustment accounts for the developmental differences commonly seen in preterm infants.
How the ASQ Screening Process Works
The ASQ is designed to be straightforward for both parents and professionals. The entire process, from distribution to results, can be completed in under 20 minutes. Here is a step-by-step breakdown of how it works.
| Step | Description | Time Required |
|---|---|---|
| 1. Select questionnaire | Choose the age-appropriate form based on the child's age | 1 to 2 minutes |
| 2. Parent completes form | Parent answers 30 questions about the child's abilities | 10 to 15 minutes |
| 3. Professional scores | Add up points in each domain and compare to cutoff scores | 2 to 3 minutes |
| 4. Review results | Discuss findings with the family and determine next steps | 5 to 10 minutes |
Question Format and Response Options
Each of the 30 items on an ASQ-3 questionnaire describes a specific skill or behavior. Parents respond to each item by selecting one of three options:
- Yes - The child performs the skill regularly (scored as 10 points)
- Sometimes - The child performs the skill occasionally or is just beginning to (scored as 5 points)
- Not yet - The child does not yet perform the skill (scored as 0 points)
Many items include simple illustrations showing the activity in question. This visual approach helps parents understand exactly what skill is being assessed, even if they are unfamiliar with developmental terminology.
Overall Section
At the end of each questionnaire, there is an "Overall" section with open-ended questions. These ask parents whether they have any general concerns about their child's development, behavior, or health. This section does not affect the numerical score but provides valuable context for the professional reviewing the results.
Understanding ASQ-3 Scores
Scoring the ASQ-3 is quick and straightforward. Each of the five developmental domains receives its own score, which is then compared against empirically established cutoff points. These cutoffs determine whether a child's development falls into one of three categories.
| Score Zone | What It Means | Recommended Action |
|---|---|---|
| Above cutoff (white/light zone) | Development appears on schedule | Continue monitoring; provide age-appropriate activities |
| Close to cutoff (gray/monitoring zone) | Development is near the concern threshold | Provide learning activities; rescreen in 2 to 3 months |
| Below cutoff (dark/referral zone) | Development may be delayed in this area | Refer for professional evaluation |
A score below the cutoff does not mean a child has a developmental disability. It means further evaluation by a specialist is recommended to determine whether the child needs support services. Early identification leads to earlier intervention, which significantly improves outcomes.
Accuracy and Reliability
The ASQ-3 demonstrates strong psychometric properties. Research shows overall sensitivity of approximately 86% and specificity of approximately 85%. This means the tool correctly identifies most children who have developmental delays while also avoiding unnecessary referrals for children who are developing typically.
The ASQ-3's accuracy has been validated across diverse populations, including children from different ethnic, cultural, and socioeconomic backgrounds. However, professionals should always consider individual circumstances and use clinical judgment alongside screening results.
ASQ:SE-2 (Social-Emotional Screening)
In addition to the ASQ-3, there is a companion tool called the ASQ:SE-2 (Ages & Stages Questionnaires: Social-Emotional, Second Edition). While the ASQ-3 focuses on developmental milestones, the ASQ:SE-2 specifically screens for social-emotional competence and behavioral concerns.
| Feature | ASQ-3 | ASQ:SE-2 |
|---|---|---|
| Focus | Developmental milestones | Social-emotional development |
| Age range | 1 to 66 months | 1 to 72 months |
| Number of questionnaires | 21 | 9 |
| Completion time | 10 to 15 minutes | 10 to 15 minutes |
| Areas assessed | 5 developmental domains | 7 social-emotional areas |
Social-Emotional Areas Assessed
The ASQ:SE-2 evaluates seven behavioral areas that are critical to healthy social-emotional development:
- Self-regulation - The child's ability to calm down or adjust to different situations
- Compliance - How well the child follows rules and directions
- Adaptive functioning - Self-care skills appropriate for the child's age
- Autonomy - The child's ability to move toward independence
- Affect - How the child expresses emotions
- Social-communication - The child's ability to interact with others
- Interaction with people - Quality of relationships with parents, caregivers, and peers
Many programs use both the ASQ-3 and ASQ:SE-2 together to get a complete picture of a child's development. The American Academy of Pediatrics recommends screening for both developmental milestones and social-emotional/behavioral concerns during well-child visits.
Benefits of Using the ASQ
The ASQ has become the most widely used developmental screening tool in the United States for several compelling reasons. Its design prioritizes accessibility, accuracy, and family engagement.
| Benefit | Description |
|---|---|
| Parent-centered | Empowers parents as experts on their own children |
| Quick and easy | Takes only 10 to 15 minutes to complete |
| Highly accurate | Sensitivity and specificity rates above 85% |
| Cost-effective | Low per-screening cost compared to clinician-administered tools |
| Culturally adaptable | Available in multiple languages and validated across diverse groups |
| Supports early intervention | Identifies concerns early when intervention is most effective |
| Research-backed | Over 30 years of research and validation studies |
Why Early Screening Matters
Research consistently shows that early identification of developmental delays leads to better outcomes. The brain develops most rapidly during the first five years of life, making this the optimal window for intervention. Children who receive early support services are more likely to catch up to their peers and succeed in school.
Without screening, many developmental delays go undetected until a child enters school. By then, critical years of potential intervention have been lost. The ASQ helps bridge this gap by providing a systematic way to monitor development starting from infancy.
Studies show that approximately 1 in 6 children in the United States has a developmental disability. However, fewer than half of these children are identified before starting school. Regular developmental screening with tools like the ASQ can dramatically improve early detection rates.
Who Uses the ASQ?
The ASQ is used across a wide range of settings and by many different types of professionals. Its flexibility and ease of administration make it suitable for virtually any program that serves young children and families.
| Setting | How the ASQ Is Used |
|---|---|
| Pediatric offices | Routine developmental screening during well-child visits |
| Early intervention programs | Initial screening to determine eligibility for services |
| Childcare and preschool centers | Ongoing developmental monitoring for enrolled children |
| Home visiting programs | Family-centered screening during home visits |
| Public health departments | Population-level screening and surveillance |
| Head Start and Early Head Start | Required developmental screening for all enrolled children |
| WIC programs | Screening during nutrition appointments |
| International development programs | Monitoring child development in low-resource settings |
The American Academy of Pediatrics (AAP) recommends standardized developmental screening at 9, 18, and 30 months of age. The ASQ-3 is one of the screening tools that meets AAP criteria. Many pediatric practices also screen at additional intervals, particularly when parents express concerns.
ASQ Pricing and Purchasing Options
The ASQ-3 and ASQ:SE-2 are published by Brookes Publishing and available in several formats. Pricing varies depending on whether a program needs paper questionnaires, the starter kit, or access to the online system.
| Product | What's Included | Approximate Cost |
|---|---|---|
| ASQ-3 Starter Kit | User's guide, 21 paper questionnaires, quick start guide, scoring sheets | $300 to $350 |
| ASQ:SE-2 Starter Kit | User's guide, 9 paper questionnaires, quick start guide, scoring sheets | $275 to $325 |
| ASQ-3 + ASQ:SE-2 Combo Kit | Both starter kits bundled together | $525 to $600 |
| ASQ Online annual subscription | Web-based administration, scoring, and reporting | $150 to $500+ per year |
| Additional paper questionnaire sets | Replacement questionnaire packets for specific age intervals | $25 to $50 per set |
The starter kit is a one-time purchase that includes photocopiable masters, so programs can reproduce the questionnaires as needed without buying additional copies. This makes the per-screening cost very low compared to other developmental assessment tools.
ASQ Online pricing is typically based on the number of children screened or the size of the program. Larger organizations may negotiate volume discounts. Many state and local early childhood programs provide the ASQ at no cost to families through publicly funded screening initiatives.
Free ASQ Screening Options for Families
Parents who want to have their child screened with the ASQ do not necessarily need to purchase the tool themselves. Many organizations offer ASQ screening at no charge.
| Resource | How to Access |
|---|---|
| Pediatrician's office | Ask your child's doctor to include developmental screening at well-child visits |
| Easter Seals | Offers free online ASQ screening through their website |
| Local early intervention programs | Contact your state's early intervention program (Part C of IDEA) |
| Head Start / Early Head Start | All enrolled children receive ASQ screening |
| Help Me Grow | Many states operate Help Me Grow affiliates that offer free screening |
| School districts | Some districts offer free developmental screening events for preschool-age children |
Under the Individuals with Disabilities Education Act (IDEA), every child in the United States is entitled to a free developmental evaluation if there are concerns about delays. Contact your state's early intervention program (for children under 3) or your local school district (for children 3 to 5) to request an evaluation at no cost.
Tips for Parents Completing the ASQ
Getting the most accurate results from the ASQ depends on thoughtful, honest responses. Here are practical tips to help parents complete the questionnaire effectively.
| Tip | Why It Matters |
|---|---|
| Try activities with your child first | Some items describe activities your child may not have had a chance to attempt |
| Answer based on what your child does regularly | Choose "yes" only if the skill is consistent, not a one-time occurrence |
| Be honest about concerns | The overall section is your chance to share anything that worries you |
| Use adjusted age for preemies | Premature babies should be screened based on their adjusted age until 24 months |
| Complete the questionnaire in a familiar setting | Children perform best in comfortable environments |
Beyond the basics in the table above, keep the following best practices in mind:
- Give your child a chance to try each activity. Before answering "not yet," try the activity described in the question. Some children simply haven't been exposed to certain tasks.
- Complete the questionnaire when your child is alert and happy. Avoid times when your child is tired, hungry, or sick, as this can affect their performance.
- Don't coach or over-help your child. The goal is to see what the child can do independently, not with significant adult guidance.
- Share the results with your child's pediatrician. Even if you complete the ASQ through another program, make sure the results become part of your child's medical record.
Frequently Asked Questions
What happens if my child scores below the cutoff?
A score below the cutoff in any developmental domain means further evaluation is recommended. This does not mean your child has a disability. It means a specialist should take a closer look to determine whether additional support would be helpful. Many children who score below the cutoff benefit from targeted activities or therapy and go on to develop typically.
How often should my child be screened?
The American Academy of Pediatrics recommends developmental screening at 9, 18, and 30 months of age. Social-emotional screening is recommended at those same intervals. Additional screenings may be recommended if there are specific concerns, risk factors, or if a previous screening showed borderline results.
Can only parents complete the ASQ?
While the ASQ is designed to be completed by parents or primary caregivers, other adults who know the child well can also fill out the questionnaire. This includes grandparents, foster parents, childcare providers, and other regular caregivers. The key is that the person completing the form should be familiar with the child's everyday abilities.
What languages is the ASQ available in?
The ASQ-3 is available in English and Spanish and has been translated and adapted into numerous other languages, including French, Arabic, Chinese, Korean, and Vietnamese. Availability of specific language versions may vary, so check with Brookes Publishing for the most current list.
What is the difference between screening and evaluation?
Screening is a quick, broad check to identify children who may be at risk for developmental delays. The ASQ is a screening tool. Evaluation, on the other hand, is a more comprehensive, in-depth assessment conducted by specialists (such as developmental pediatricians, psychologists, or therapists) to determine whether a child qualifies for services. Screening happens first, and evaluation follows only when screening results indicate potential concerns.
How accurate is the ASQ?
The ASQ-3 has been validated in numerous studies and demonstrates strong accuracy. It correctly identifies approximately 86% of children with developmental delays (sensitivity) and correctly identifies approximately 85% of children who are developing typically (specificity). These rates are comparable to or better than many clinician-administered screening tools.
Should I use adjusted age for my premature baby?
Yes. For children born before 37 weeks of gestation, use the adjusted age (chronological age minus the number of weeks premature) when selecting the appropriate ASQ questionnaire. This adjustment is recommended until the child reaches 24 months of adjusted age, at which point chronological age is typically used.