How to Read an ADHD Evaluation Report: A Parent's Guide

The evaluation report arrived — 8, 12, maybe 20 pages of tables, T-scores, percentile ranks, clinical classifications, and narrative paragraphs dense with terms you've never encountered. Somewhere in this document are the answers about your child's functioning. Here's how to read it without a psychology degree.

The Overall Structure

Most ADHD evaluation reports follow a standard structure, whether they come from a school psychologist, a clinical psychologist, or a neuropsychologist:

Reason for referral: Why the evaluation was requested and what questions it aims to answer. Read this carefully — it tells you the scope. An evaluation initiated for "attentional concerns and academic underperformance" should address both attention and academic functioning.

Background and history: Developmental milestones, medical history, family history, prior evaluations, and educational history. Check this section for accuracy — evaluators sometimes get details wrong from intake interviews, and errors here can affect conclusions.

Behavioural observations: What the evaluator observed during testing — how the child responded to the test environment, whether they needed breaks, whether they fidgeted or lost focus, whether they were cooperative. Keep in mind that one-on-one testing in a quiet room is the ideal environment for a child with ADHD. Average behaviour during testing doesn't mean average functioning in the classroom.

Test results: The data tables. This is where T-scores, standard scores, percentile ranks, and clinical classifications live. It's also where most parents get lost.

Summary and recommendations: The evaluator's conclusions and suggested interventions. Read this first if you want the bottom line, then go back and understand the data that supports it.

Decoding T-Scores

T-scores are the standard metric on most behavioural rating scales (Conners 4, BASC-3, BRIEF-2). The system works like this:

• A T-score of 50 is the average for the normative population
• Each 10-point increment equals one standard deviation from the mean
• A T-score of 60 is one standard deviation above average
• A T-score of 70 is two standard deviations above average

On clinical scales (measuring problems), higher T-scores mean more difficulty, but the classification bands differ by instrument. For example, Conners 4 scores of 40–59 are Average, 60–64 Slightly Elevated, 65–69 Elevated, and 70+ Very Elevated. BASC-3 clinical scales use 41–59 as Average, 60–69 as At-Risk, and 70+ as Clinically Significant. The BRIEF-2 uses below 60 as Average, 60–64 as Mildly Elevated, 65–69 as Potentially Clinically Elevated, and 70+ as Clinically Elevated. Check the specific scale's report labels.

On BASC-3 adaptive scales, lower scores indicate more difficulty: 41–59 is Average, 31–40 At-Risk, and 30 or below Clinically Significant.

On adaptive scales (measuring strengths like social skills), the direction flips — lower T-scores mean more difficulty. A Social Skills T-score of 35 indicates a deficit, not a strength.

Decoding Percentile Ranks

Percentile ranks tell you where the child falls relative to the scale's normative reference group. A T-score of 65 on an attention scale is approximately the 93rd percentile; a T-score of 70 corresponds to the 98th percentile. The percentile describes the score's position in the norm group, not a diagnosis or eligibility decision.

Percentiles are often easier to explain at meetings: "My child's inattention is worse than 98% of children their age according to this standardised test."

Reading the Score Tables

The data tables typically show each scale name, the T-score or standard score, the percentile rank, and a classification (Average, At-Risk, Clinically Significant, etc.). Focus on:

The composite scores first. Composites (Externalizing Problems, Internalizing Problems, Global Executive Composite) summarise multiple subscales. They give you the overall picture before you dive into details.

Individual elevated scales. Use the instrument's own labels and thresholds to identify concerns. Each elevation points to an area to consider in the context of the child's functioning and the report's recommendations.

Discrepancies between informants. If the report includes both parent and teacher data, compare the profiles. Where they agree, the finding is robust. Where they disagree, look for the evaluator's analysis of why — and whether that analysis is adequate.

Adaptive scales. These are frequently overlooked by both evaluators and parents because the clinical scales feel more urgent. Low adaptive scores (such as Adaptability, Social Skills, or Functional Communication at or below T = 40) can provide evidence of skill concerns; the team also considers how those concerns affect educational functioning.

What to Look for in the Narrative

Beyond the score tables, the narrative sections should:

Explain what elevated scores mean in practical terms. A good report doesn't just say "Inattention T-score = 72, Clinically Significant." It explains what that looks like in the child's daily life — difficulty sustaining focus during independent work, missing verbal instructions, needing frequent redirection.

Address cross-informant discrepancies. If parent and teacher profiles differ, the report should discuss possible reasons — classroom structure, masking, medication timing, rater perspective differences — rather than simply noting the discrepancy exists.

Connect test results to functional recommendations. Each elevated score should lead to a specific recommendation. If the BRIEF-2 Working Memory scale is elevated at T = 71, the recommendations should include interventions that target working memory deficits (written instructions, graphic organisers, reduced cognitive load).

Rule out alternative explanations. A thorough evaluation considers whether anxiety, depression, learning disabilities, trauma, or medical conditions could explain the elevated scores instead of (or alongside) ADHD.

Red Flags in a Report

Watch for reports that:

• Dismiss your parent ratings because teacher ratings were lower, without analysing why
• State that "grades are fine, so there's no educational impact" without examining executive functioning, work completion, homework duration, or social functioning
• Report validity scale flags (Inconsistency, Negativity) without contextual explanation
• Make diagnostic conclusions based only on a single rating scale without corroborating data

The ADHD Rating Scale Decoder gives you a complete reference for every score on the Conners 4, BASC-3, BRIEF-2, Vanderbilt, ADHD-RS-5, and SNAP-IV — with plain-language translations and a scale-to-accommodation matrix so you can walk into the meeting knowing exactly what the report says and what to ask for.