Online CAST autism screening tool
If your child is younger than 4, please complete the M-CHAT-R screening tool instead of the CAST.
How the CAST works
Who completes the CAST?
A parent, caregiver, or teacher who is familiar with the child’s day-to-day behavior should complete the CAST.
How long does the CAST take?
It takes about 5–10 minutes to complete all 37 questions.
What does the CAST ask about?
The CAST covers topics such as:
- Social engagement (e.g., playing with other children)
- Verbal and nonverbal communication
- Imaginative play
- Repetitive behaviors or narrow interests
CAST scoring
The CAST is a 37-question yes-or-no screening tool that looks at behaviors and communication patterns associated with autism spectrum disorder (ASD). Each response is scored based on how closely it aligns with characteristics commonly seen in autistic children.
CAST scoring method
Each response receives a score of 0 or 1, depending on whether it reflects a potential sign or trait of autism. The total score can range from 0 to 31. Only 31 of the 37 questions are scored; the remaining 6 are control questions.
Score range
Interpretation
Recommended action
0-14
Low likelihood of autism traits
No further action needed unless other concerns exist
15-30
Possible autism traits
Follow up with a professional autism evaluation
+31
High likelihood of autism
Immediate clinical assessment is recommended
It’s important to note that the CAST is just a screening tool, not a test that gives a diagnosis. A high score doesn’t mean your child has autism. It just means they may need a closer look with a more detailed evaluation, like the ADOS-2.
What to expect after the CAST
Once you complete the CAST, we're here to guide you the rest of the way.
1. Review of your child’s CAST results
Within one business day, a Clinic Admissions Associate (CAA) will contact you to review your child’s results and discuss any concerns you may have.
2. Comprehensive evaluation
If your child’s CAST score suggests signs of autism, we may recommend a follow-up evaluation like the ADOS-2. We send the results of this evaluation to your child's doctor who will make the final diagnosis.
3. Personalized autism care plan
If your child is diagnosed with autism, we’ll walk you through the next steps, including:
- Insurance verification and benefits check
- A meeting with a Board Certified Behavior Analyst® (BCBA®)
- Creation of individualized ABA therapy goals tailored to your child’s needs.
CAST autism screening tool
Please answer the following questions about your child, considering how they usually behave. It's important that the person who completes the CAST has seen how the child behaves in different settings and situations. If you have seen your child engage in a behavior a few times, but they do not usually do it, then please answer no. Please check yes or no for every question.
