CAST Test Results
CAST Scores: What They Mean
The Childhood Autism Spectrum Test (CAST) is a screening questionnaire used to identify children who may show traits commonly associated with autism. It is typically completed by a parent or caregiver and is designed for school-aged children.
CAST is not a diagnostic tool. Instead, it helps determine whether a child may benefit from additional evaluation or support.
How CAST Scoring Works
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Parents or caregivers answer a series of yes/no questions
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Each response associated with autism-related traits scores one point
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Points are totaled to create an overall CAST score
Understanding CAST Score Ranges
While exact score cutoffs may vary, results are generally interpreted in the following way:
Lower scores
Indicate behaviors within expected developmental ranges. Autism is considered unlikely, though families may still pursue support if concerns exist.
Borderline scores
Suggest that some autism-related traits may be present. Monitoring development or discussing next steps with a provider is often recommended.
Higher scores
Indicate a higher number of autism-related traits. A comprehensive diagnostic evaluation is typically recommended to better understand the child’s needs.
What CAST Scores Do Not Mean
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They do not confirm an autism diagnosis
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They do not measure severity
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They do not define a child’s abilities or future
CAST is a starting point, not a label.
Next Steps After CAST
If a CAST score suggests further evaluation may be helpful, next steps may include:
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A full developmental or diagnostic assessment
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Additional screening tools or observations
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Referrals for speech, behavioral, or developmental support
Early understanding helps families access the right resources and support at the right time.
For Parents
Every child develops at their own pace. CAST results are simply one piece of information to guide thoughtful conversations and informed decisions about your child’s care.
Moderate Result Content
Moderate Result
What This Result Means
A moderate CAST result suggests that your child shows some traits that are commonly associated with autism. These traits may affect social communication, interaction, or behavior, but they do not automatically indicate an autism diagnosis.
Children with moderate results often demonstrate a mix of strengths and challenges, and their needs can vary widely. At this level, it is helpful to continue observing development and to discuss results with a qualified professional.
What Happens Next
Families may be encouraged to:
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Monitor development over time
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Discuss concerns with a pediatrician, psychologist, or developmental specialist
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Consider additional screening or targeted support if concerns persist
A moderate result is best viewed as an early signal, helping guide thoughtful next steps rather than drawing conclusions.
A Reassuring Note for Families
CAST results are tools for understanding, not labels. Every child develops uniquely, and these results are meant to support informed decisions—not define potential or outcomes.
Significant Result Content
Significant Result
What This Result Means
A significant CAST result indicates that your child shows a higher number of traits commonly associated with autism. This suggests that a comprehensive diagnostic evaluation would be helpful to better understand your child’s developmental profile.
This result does not provide a diagnosis on its own. Instead, it highlights the importance of a more in-depth assessment by trained professionals who can evaluate communication, social skills, behavior, and development in greater detail.
What Happens Next
Families are typically encouraged to:
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Schedule a full developmental or diagnostic evaluation
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Explore supportive services as recommended by a provider
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Begin gathering information that helps identify your child’s strengths and support needs
Early evaluation allows families to access appropriate guidance, resources, and support as soon as possible.
A Reassuring Note for Families
CAST results are tools for understanding, not labels. Every child develops uniquely, and these results are meant to support informed decisions—not define potential or outcomes.