Vanderbilt Assessment Scoring: How to Read Your Child's Results

How the Vanderbilt Works

The NICHQ Vanderbilt Assessment is a free, public-domain rating scale used heavily in pediatric primary care to screen for ADHD. Unlike the Conners 4 or BASC-3, which produce T-scores compared to normative samples, the Vanderbilt uses raw symptom counts and a separate set of performance items. That simpler structure makes it easier to score—but also easier to misread.

Each rater (parent or teacher) scores 18 core ADHD symptom items on a 4-point scale: 0 (Never), 1 (Occasionally), 2 (Often), 3 (Very Often). A symptom "counts" toward a DSM-5-TR criterion only when scored 2 or 3. To meet the inattentive threshold, a child needs at least 6 of the first 9 items rated 2 or 3. For the hyperactive-impulsive threshold, it is 6 of the next 9 items at the same level.

The Vanderbilt also screens for Oppositional Defiant Disorder (3 of 8 items at 2 or 3), Conduct Disorder (3 of 14 items at 2 or 3), and Anxiety/Depression (3 of 7 items at 2 or 3). These are screening flags, not diagnoses—they signal that further evaluation is warranted.

The Performance Items Most Parents Miss

Below the symptom section, a block of performance questions rates academic and behavioral functioning on a 1-to-5 scale: 1 (Excellent) through 5 (Problematic). Impairment is flagged when any performance item is scored 4 (Somewhat of a Problem) or 5 (Problematic).

This matters because a child can meet the symptom count threshold and still not meet impairment criteria if every performance item stays at 3 or below. Pediatricians following AAP guidelines look for both: enough symptoms at the right severity and documented functional impact. If the teacher marks performance items as average while the parent marks them as problematic, the evaluator needs to reconcile that gap—not simply average the two forms.

When the Teacher's Scores Come Back Lower

Parent-teacher discrepancies on the Vanderbilt are common. Meta-analyses of ADHD rating scales report average parent-teacher agreement correlations of just 0.25 to 0.33. Several patterns explain why teachers consistently rate lower:

Classroom structure contains symptoms. A well-managed classroom with clear routines, short task rotations, and a low student-to-teacher ratio can externally regulate behaviors that run unchecked at home during homework, transitions, and unstructured time.

Medication timing. Short- or intermediate-acting stimulants may provide symptom coverage during school hours and wear off in the late afternoon, so parents may observe symptoms returning after school.

Masking. Some children—especially girls with predominantly inattentive presentations—may expend effort suppressing symptoms at school. That effort can deplete regulatory reserves, contributing to emotional meltdowns or task-initiation difficulty after they get home.

Rater calibration. A teacher whose class includes several highly disruptive students may rate a moderately inattentive child as "average" relative to their classroom, even though that child would stand out in a quieter setting.

If the teacher's Vanderbilt comes back un-elevated, that does not mean your child's difficulties are not real. It means the screening did not capture them in that setting. You can ask the evaluator to look at which items the teacher rated differently, request that multiple teachers complete forms (for middle-schoolers with different classes), or request supplemental observation data rather than relying on a single form.

What the Vanderbilt Cannot Tell You

The Vanderbilt is a screener, not a diagnostic instrument. It does not produce T-scores, so it cannot tell you where your child falls relative to a normative peer sample. It cannot differentiate ADHD from anxiety-driven inattention, trauma-related hypervigilance, or a learning disability that causes secondary off-task behavior. And because it relies on counting "often" and "very often" responses, a rater who is uncertain will sometimes default to "occasionally," pushing scores below threshold even when functional impairment is present.

If your child's Vanderbilt results are borderline or contradictory between raters, a comprehensive evaluation with T-score-based instruments (Conners 4, BASC-3, BRIEF-2) gives a fuller picture of where the child stands relative to age-matched peers.

The ADHD Rating Scale Decoder walks through the Vanderbilt scoring rules item by item, explains how to read the screening subscales, and provides a framework for addressing teacher-parent discrepancies at eligibility meetings.

Follow-Up Forms Track Medication and Side Effects

After diagnosis, Vanderbilt follow-up forms measure whether symptoms have decreased and monitor medication side effects—appetite suppression, sleep problems, tics, and mood changes. These follow-up scores should be compared to the baseline forms to track treatment response over time. If side-effect items are creeping up while symptom items are barely moving, that is a conversation to have with the prescribing physician before the next refill.