The Certified Autism Specialist credential, awarded by the International Board of Credentialing and Continuing Education Standards, is for professionals who work with or support people with autism. This page gives you free practice sets sorted by competency area, worked questions with explanations, a study plan, and plain answers about exam format, scoring and eligibility.
Numbers in brackets link to the official sources listed under Sources & last verified. Dates that have passed are removed automatically.
According to International Board of Credentialing and Continuing Education Standards, “The CAS Autism Competency Exam has approximately 60 multiple choice questions. A passing score of 80% is required..”[1]
The Certified Autism Specialist credential is awarded by the International Board of Credentialing and Continuing Education Standards (IBCCES). The CAS Autism Competency Exam is administered online via an online proctoring system. It has approximately 60 multiple-choice questions, and candidates are given a total of 90 minutes. A passing score of 80% is required.
Eligibility is separate from the exam. Applicants need 14 hours of continuing education that directly relates to autism, earned within the last 2 years. They also need 2 years of experience working in a field that treats or supports individuals with autism, plus a graduate-level degree. The degree requirement is waived for applicants with a bachelor's degree and at least 10 years of experience.
After the board approves your application, you get immediate access to a digital certificate and badge, and your certification packet is prepared within 2-3 weeks. The credential is valid for 2 years, and renewal costs $199 every 2 years. If you take the IBCCES training program, the coursework and final exam must be completed within 60 days.
We have not listed an exam fee or a retake policy because they are not among the facts we verified. Check ibcces.org for current rules before you apply or book your exam.
The content areas below are copied from the official CAS content outline published by International Board of Credentialing and Continuing Education Standards, with the share of the exam each area carries. The right-hand column shows which of our practice sets covers it.
| Official content area | Weight | Practice on this site |
|---|---|---|
| Autism Overview[1] | 26% | CAS Autism Overview Practise core definitions, characteristics and the reasoning behind early identification and intervention. |
| Behavior Competency[1] | 11% | CAS Behavior Competency Practise linking a behavior to its likely function and choosing a supportive, proactive response. |
| Communication Competency[1] | 8% | CAS Parent Communication Competency Practise matching communication supports to the person and working clearly with families. |
| Emotional Awareness and Bullying Competency[1] | 3% | Mixed practice tests above Review how to help people recognise emotions and how to respond when a student is being bullied. |
| Environment Competency[1] | 9% | Mixed practice tests above Review how routines, structure and physical surroundings can be adjusted to reduce barriers. |
| Medical and Health Considerations[1] | 12% | Mixed practice tests above Review common co-occurring health conditions and when to refer to a medical professional. |
| Motor Skill Competency[1] | 2% | Mixed practice tests above Review how motor differences show up in daily tasks and which supports are appropriate. |
| Program Development Competency[1] | 17% | CAS Educational & Transition Planning Comp... Practise telling accommodations from modifications and planning goals and transitions. |
| Sensory Awareness Competency[1] | 4% | CAS Sensory Processing & Integration Compe... Practise recognising sensory over- and under-responsiveness and choosing fitting supports. |
| Social Skills Competency[1] | 8% | CAS Social Skills Development Competency Practise choosing teaching strategies that build social understanding in realistic settings. |
Prepare for the CAS - Certified Autism Specialist exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
These are practice questions written for this site, not questions from the real exam. Each explanation shows why the right answer is right and why the others are wrong.
Question: Which type of curriculum modification involves simplifying the complexity or difficulty of content while maintaining access to the same general education curriculum?
Answer: C. Modifications
Explanation:
The answer is Modifications. A modification changes what a student is expected to learn or show, for example by reducing the complexity or amount of content, while the student stays in the same general education curriculum. Accommodations are wrong because they change how a student reaches the same content, not the content itself. Curriculum compacting is wrong because it condenses material a student has already mastered so they can move faster, which is not simplification. Enrichment is wrong because it adds depth or extension rather than lowering difficulty. Rule to remember: accommodations change the route, modifications change the target. When a question mentions simplified content or reduced expectations, think modification.
Question: Why is early identification of autism important?
Answer: B. It allows for early intervention and improved outcomes
Explanation:
The answer is that early identification allows for early intervention and improved outcomes. Spotting differences sooner lets families and professionals begin supports while a child is developing quickly. It does not prevent autism from developing, because identification describes what is already present and does not change the underlying condition. It does not ensure a child will outgrow autism, since no such outcome can be promised. It is not only for children with severe symptoms, because supports are useful across a wide range of needs. Rule to remember: identification is the doorway to support, and options that promise prevention or a cure are almost always wrong.
Question: How do early intervention services help children with autism?
Answer: B. They help improve communication and social skills
Explanation:
The answer is that early intervention services help improve communication and social skills. Services such as speech and occupational therapy target the skills a young child is building, which supports overall development. The claim that they have no effect is wrong because support is intended to make a difference. The claim that they are only useful for physical disabilities is wrong because they address communication, social and developmental needs. The claim that they replace the need for a diagnosis is wrong because services and diagnosis do different jobs and one does not stand in for the other. Rule to remember: intervention builds skills, and absolute words such as only or replace are warning signs.
Start with the official IBCCES material so you know the exam's content areas and format, then use these sets to find where you are weak.
Our questions are written by us and are not real exam questions. Treat them as a way to test your reasoning, not to predict what you will see.
The CAS Autism Competency Exam has approximately 60 multiple-choice questions. Candidates are given a total of 90 minutes to complete it. The exam is administered online via an online proctoring system, so confirm your technical setup with IBCCES before the day.
A passing score of 80% is required. Because the bar is high, review every question you miss in practice and make sure you understand the reasoning, not just the answer. Check the official IBCCES site for the latest scoring details.
Applicants need 14 hours of autism-related continuing education earned within the last 2 years, and 2 years of experience in a field that treats or supports individuals with autism. A graduate-level degree is expected, but it is waived for a bachelor's degree with at least 10 years of experience.
Once the board approves your application, you have immediate access to a digital copy of your certificate and badge. Your certification packet is prepared within 2-3 weeks of approval. Confirm timing with IBCCES, since processing can depend on your application.
Credentials are valid for 2 years. Renewal costs $199 every 2 years. Check the IBCCES renewal policy for the continuing education and paperwork required, because those requirements can change and we have not listed them here.
No. The questions on this site are written by us with AI tools and are not real exam questions. They are meant to help you practise reasoning across the competency areas. Use the official IBCCES material as your main source for what the exam covers.
How we verify: editorial & fact-checking policy. Report an error: contact us.