The 8-year-old who cannot sit still: ADHD versus everything else it looks like
Hyperactivity in a child is the presenting problem in dozens of NCE items. ADHD is the answer in fewer of them than you would expect. Here is the item that shows what the exam wants you to rule out first.
By Dr. Andrew Wichterman · September 22, 2026 · 6 min read · Updated October 22, 2026
Hyperactivity in a child is the presenting problem in dozens of NCE items. ADHD is the answer in fewer of them than you would expect. Here is the item that shows what the exam wants you to rule out first.
The practice item discussed here was written for this site in the style of the NCE. It is not a question from the actual exam. NBCC does not release its items, and candidates sign a nondisclosure agreement.
The item
An 8-year-old boy is referred for inattention and restlessness at school that began three months ago. His teacher reports he was an attentive student until this fall. His parents separated over the summer and he now alternates weeks between two homes. He sleeps poorly and has become tearful. Which is the MOST appropriate initial clinical conclusion?
A. ADHD, combined presentation
B. Oppositional defiant disorder
C. An adjustment reaction to the family disruption, warranting further assessment before any ADHD diagnosis
D. Bipolar disorder, pediatric onset
Keyed answer: C. ADHD requires symptoms present before age 12 across two or more settings, and a pattern that is developmental rather than reactive. This child was attentive until a clear stressor three months ago, and his symptoms include sleep disturbance and tearfulness. The exam wants you to see an adjustment reaction and assess further, not to diagnose a neurodevelopmental disorder from a recent change.
ADHD has a history requirement
The criterion candidates forget is onset. Several symptoms must be present before age 12, and the pattern is persistent, not something that started this semester. A vignette that gives you a clear before-and-after around a stressor is telling you the answer is not ADHD, however hyperactive the child looks now.
The second requirement is setting. Symptoms in two or more settings: home and school, school and activities. A child who is inattentive only in one classroom has a classroom problem, not ADHD.
Why each wrong answer tempts you
A. ADHD is a chronic pattern, not a new onset after a stressor. Nothing here predates the separation.
B. No defiance, anger or rule-violating behavior is described.
D. Pediatric bipolar disorder is diagnosed rarely and requires episodic mood elevation; a sad, restless child after a divorce is not it.
What restlessness in a child can be
Anxiety looks like fidgeting and poor concentration. Depression in children looks like irritability and restlessness more often than sadness. Trauma looks like hypervigilance and distraction. Sleep deprivation looks like all of it. Adjustment to a family change looks like the item above. The exam wants a counselor who assesses before labeling, so the answer to a new-onset restlessness vignette is nearly always "assess for the stressor, mood and sleep" rather than a diagnosis.
When ADHD is the answer
The vignette will say the pattern has been present since preschool or early elementary school, in more than one setting, with no precipitating event. It may mention a parent with the same history. Then the item usually turns on presentation: six inattentive symptoms (five for age 17 and up) without hyperactivity is predominantly inattentive; six hyperactive-impulsive without inattention is predominantly hyperactive-impulsive; both is combined.
The two neighbors the exam pairs with ADHD
Oppositional defiant disorder: six months of angry mood, argumentative behavior and vindictiveness, without violating others' rights. It co-occurs with ADHD often but is defined by defiance, not inattention. Disruptive mood dysregulation disorder: severe recurrent temper outbursts with persistently irritable mood between them, in a child 6 to 18 with onset before 10. It exists specifically to keep chronically irritable children from being diagnosed with bipolar disorder.
The treatment sentence
If an item does reach treatment, the answer for ADHD is stimulant medication plus behavioral parent training, with classroom supports under a 504 plan or IEP. For the child in the item above, the answer is support through the transition, coordination with both parents, and reassessment; a stimulant would treat a disorder he does not have.
Where this lives in the course
This distinction is covered in Domain 3, Areas of Clinical Focus: the lesson "Psychotic, personality, neurodevelopmental, eating and sleep disorders". Read the lesson, take its quiz, and add the key terms to your flashcard queue.
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Every deep-dive item on this site was written for the site in the style of the NCE. None is from the actual exam.