# Similarities and Differences Between ASQ-3 and ASQ:SE-2

The ASQ-3 and ASQ:SE-2 tools help parents and professionals to build a picture of children’s development and abilities. While these tools share some common features, they also have unique differences that are important to know!

## Similarities

- Parent-completed  
- Used in a variety of settings (early learning, pediatrics, public health)
- Multiple completion options (print, online, with or without support)
- Flexibility supports use with most families
- Written at 4th–6th grade reading levels
- Screening process opens discussion with parents about child’s development
- Monitoring zone points to areas that would benefit from practice or support
- Extensively researched with evidence of high reliability and validity
- Referral area indicates need for in-depth assessment (and possible services)
- Follow-up includes parent concerns

## Unique features of ASQ-3

- 21 questionnaire intervals screen from 1–66 months

## Unique features of ASQ:SE-2

- Questions address competence skills
- Question response options: Yes, Sometimes, Not Yet
- Scoring of question responses is consistent
- Results of multiple questionnaires (parent, teacher, other caregiver) can be combined for scoring
- Answers based on observation of child’s skills
- Before answering, questions must be tried with child or observed
- Screens 1 developmental area
- 9 questionnaire intervals screen from 1–72 months
- Questions mix social competence and challenging behaviors
- Number of scored questions varies across questionnaire intervals
- Question response options: Often or Always, Sometimes, Rarely or Never
- Questions are answered based on recent memory of child’s behavior
- Results of multiple questionnaires (parent, teacher, other caregiver) should not be combined for scoring
- Answers based on observation and personal interpretation of behavior

Learn more about the ASQ tools at [www.agesandstages.com](/content/site-root.html)