Understanding Your Child's Autism Diagnosis Report: A Parent's Guide
Autism evaluation reports are full of jargon. Learn what ADOS-2 scores, adaptive behavior scores, IQ assessments, and DSM-5 criteria actually mean for your child.
Understanding Your Child’s Autism Diagnosis Report: A Parent’s Guide
TL;DR: Your child’s autism evaluation report is one of the most important documents you’ll receive — it drives treatment decisions, insurance authorization, school services, and provider matching. But the reports are often dense, jargon-heavy, and confusing. Understanding what ADOS-2 scores mean, what “Level 2” really indicates, what adaptive behavior assessments show, and how cognitive testing fits in gives you the power to advocate effectively. This guide translates the common components of autism evaluation reports into plain language.
You just received a 15-page report. It’s full of numbers, percentile rankings, standardized scores, and clinical language you’ve never seen before. The diagnostician explained things at the feedback session, but it went by so fast, and you were processing the word “autism” more than the details.
Now you’re home, staring at this document, and you need to understand it — because the school wants it for the IEP, the insurance company needs it for ABA authorization, and the BCBA wants to review it.
Let’s decode it together.
Components of a Typical Evaluation Report
1. Background and History
This section summarizes:
- Developmental history (milestones, early concerns)
- Medical history
- Family history
- Previous evaluations and services
- Current concerns (usually from parent interview)
Why it matters: Ensures the evaluator understands the full picture. Check it for accuracy — errors here can affect interpretation.
2. Behavioral Observations
What the evaluator observed during the assessment:
- Social engagement (eye contact, joint attention, social reciprocity)
- Communication (verbal language, nonverbal communication, conversational ability)
- Restricted/repetitive behaviors (stimming, rigidity, special interests)
- Play behavior (functional, pretend, interactive)
- Sensory behaviors
Why it matters: These observations supplement the standardized test scores and provide qualitative context.
3. ADOS-2 Results
The Autism Diagnostic Observation Schedule, Second Edition (ADOS-2) is the gold-standard diagnostic tool.
Modules: The evaluator chooses a module based on language level:
- Module 1: Pre-verbal or single words
- Module 2: Phrase speech
- Module 3: Fluent speech (children)
- Module 4: Fluent speech (adolescents/adults)
Scores:
| Score Category | What It Measures |
|---|---|
| Social Affect (SA) | Social communication, interaction, emotional expression |
| Restricted and Repetitive Behavior (RRB) | Repetitive behaviors, sensory interests, rigidity |
| SA + RRB = Total | Combined score compared to cutoffs |
Comparison scores (1-10):
- 1-2: Minimal evidence of autism-related symptoms
- 3-4: Low evidence
- 5-7: Moderate evidence
- 8-10: High evidence
Classification:
- Below cutoff: Does not meet ADOS-2 criteria
- Meets autism spectrum cutoff: Consistent with autism spectrum diagnosis
- Meets autism cutoff: Consistent with autism diagnosis (higher level of symptoms)
Important: The ADOS-2 alone doesn’t diagnose autism — it’s one piece of a comprehensive evaluation.
4. Cognitive/IQ Assessment
Common assessments: Wechsler Preschool and Primary Scale of Intelligence (WPPSI), Wechsler Intelligence Scale for Children (WISC), Stanford-Binet, Mullen Scales of Early Learning.
Understanding scores:
| Standard Score | Percentile | Classification |
|---|---|---|
| 130+ | 98th+ | Very Superior |
| 120-129 | 91st-97th | Superior |
| 110-119 | 75th-90th | High Average |
| 90-109 | 25th-74th | Average |
| 80-89 | 9th-24th | Low Average |
| 70-79 | 2nd-8th | Borderline |
| Below 70 | Below 2nd | Intellectual Disability range |
For autistic children, look for:
- Scatter between subtests — large differences between verbal and nonverbal, or between different cognitive domains. This is common in autism and tells you about specific strengths and weaknesses.
- Processing speed — often lower in autistic individuals, affecting timed tasks disproportionately.
- Verbal vs. performance IQ — discrepancies may indicate specific processing differences.
Critical context: IQ scores in autistic children can be UNDERESTIMATES. Sensory differences, communication challenges, anxiety, and task demands can all suppress scores. A low IQ score does not necessarily mean low intelligence — it means the test captured a specific performance on a specific day under specific conditions.
Find ABA providers near you who use comprehensive assessments to design individualized ABA programs.
5. Adaptive Behavior Assessment
Common tools: Vineland Adaptive Behavior Scales (Vineland-3), Adaptive Behavior Assessment System (ABAS-3).
These measure FUNCTIONAL skills — what your child actually DOES in daily life, regardless of what they CAN do.
Domains:
| Domain | What It Measures | Examples |
|---|---|---|
| Communication | Receptive and expressive language in daily life | Following directions, answering questions, having conversations |
| Daily Living Skills | Self-care and independence | Dressing, eating, toileting, hygiene, chores |
| Socialization | Social interaction and relationships | Playing with others, friendships, social cues, empathy |
| Motor Skills | Fine and gross motor (Vineland-3 only) | Writing, cutting, running, climbing |
Score interpretation (same scale as IQ):
- Standard score: Mean 100, SD 15
- Subdomain scores: Mean 15, SD 3 (v-scale scores)
- Age equivalent: What age level the child is functioning at for that skill
The common autism pattern: Adaptive behavior scores are typically LOWER than cognitive scores. A child with an IQ of 110 and adaptive behavior of 75 has a significant gap between what they CAN do (cognitively) and what they DO do (functionally). This gap drives treatment — ABA therapy targets closing it.
6. Language Assessment
If a speech-language pathologist (SLP) was part of the team:
Common tools: Clinical Evaluation of Language Fundamentals (CELF), Preschool Language Scales (PLS), Peabody Picture Vocabulary Test (PPVT).
Key scores:
- Receptive language: Understanding spoken language
- Expressive language: Using language to communicate
- Pragmatic/social language: Using language in social contexts
In autism: Pragmatic language is typically the most affected domain, even when vocabulary and grammar are strong.
7. Sensory Profile
Common tool: Sensory Profile 2 (Winnie Dunn’s model)
Quadrants:
| Pattern | What It Means |
|---|---|
| Seeking | Craves sensory input; active, moving, touching |
| Avoiding | Withdraws from sensory input; prefers quiet, predictable |
| Sensitivity | Notices everything; distracted by sensory input |
| Registration | Misses sensory input; seems unaware of environment |
Most autistic individuals show a MIXED profile — seeking in some areas, avoiding in others.
8. DSM-5 Diagnosis
The final diagnosis section references the DSM-5 criteria:
Criterion A: Persistent deficits in social communication and social interaction (all three required):
- Social-emotional reciprocity
- Nonverbal communicative behaviors
- Developing, maintaining, and understanding relationships
Criterion B: Restricted, repetitive patterns of behavior (at least two of four):
- Stereotyped or repetitive motor movements, speech, or use of objects
- Insistence on sameness, inflexible adherence to routines
- Highly restricted, fixated interests abnormal in intensity or focus
- Hyper- or hypo-reactivity to sensory input
- Level 1: Requiring support
- Level 2: Requiring substantial support
- Level 3: Requiring very substantial support
Important: Levels are assigned SEPARATELY for social communication and restricted/repetitive behaviors. A child can be Level 2 for social communication and Level 1 for restricted behaviors.
Take our matching quiz to find ABA providers who thoroughly review diagnostic reports.
What to Do with the Report
For Insurance
Insurance companies need the diagnosis report to authorize ABA therapy:
- Confirm the DSM-5 diagnosis of Autism Spectrum Disorder
- Autism severity level may affect authorized hours
- Adaptive behavior scores demonstrate functional need
- Cognitive scores may affect treatment goals
- Keep multiple copies — you’ll submit this to every provider and insurance company
For School (IEP/504)
Bring the report to the IEP meeting:
- The diagnosis qualifies your child for special education under “Autism” category
- Adaptive behavior scores guide IEP goal areas
- Cognitive scores inform academic expectations
- Sensory profile guides classroom accommodations
- Language scores guide speech therapy recommendations
For ABA Therapy
Your BCBA uses the report to:
- Understand your child’s cognitive and adaptive profile
- Identify the gap between ability and performance (treatment target)
- Set appropriate goals matched to developmental level
- Design a treatment plan aligned with diagnostic findings
- Write insurance authorization requests
Questions to Ask the Evaluator
- “What does this score mean for my child’s daily life?”
- “Where are the biggest gaps between ability and performance?”
- “What does the severity level mean for the kind of support my child needs?”
- “What treatment do you recommend based on these results?”
- “When should we reassess?”
- “Is there anything in the results that surprised you?”
Frequently Asked Questions
My child’s IQ score seems too low. Can autism affect test scores?
Yes — significantly. Autistic children may score lower on IQ tests due to: anxiety in the testing environment, difficulty understanding the social demands of testing, sensory issues in the testing room, processing speed differences that penalize timed tasks, and communication differences that affect verbal subtests. If you believe the score doesn’t reflect your child’s true ability, discuss this with the evaluator. Non-verbal IQ tests or repeat testing in a more comfortable environment may yield different results.
What does “Level 2” mean for my child’s future?
Autism levels describe CURRENT support needs, not future outcomes. A child diagnosed at Level 2 at age 4 may be at Level 1 by age 10 with effective intervention. Levels can change. They’re a snapshot, not a destiny. What matters most is the quality of support and intervention, not the initial level. See our autism spectrum levels guide.
Should I get a second opinion?
Consider a second opinion if: the diagnosis doesn’t match what you observe at home, the evaluation was very brief (less than 2-3 hours), the evaluator seemed unfamiliar with autism in your child’s demographic (girls, BIPOC, high-IQ), or the recommendations don’t match current evidence. See our guide on understanding the ADOS.
How often should my child be reassessed?
Full comprehensive reassessment: every 2-3 years, or when there are significant changes. ABA-specific assessments (VB-MAPP, ABLLS-R): every 6-12 months as part of ongoing therapy. Insurance re-authorization may require updated assessment data at specific intervals.
The report says my child has “co-occurring” conditions. What does this mean?
Many autistic individuals have additional diagnoses: ADHD (50-70% co-occurrence), anxiety (40-50%), sensory processing disorder, language disorders, intellectual disability, or others. Each co-occurring condition may need its own treatment plan. The BCBA and other providers should address all conditions, not just autism.
Browse ABA clinics near you that conduct thorough assessments and create individualized ABA treatment plans.