ABPN CAP common mistakes
ABPN CAP · Understand the traps and how to avoid them.
Diagnosing a disorder when the behavior is a normal developmental variant, such as calling preschool rituals OCD, adolescent moodiness major depression, or separation distress at school entry separation anxiety disorder, without documenting cross-situational impairment or deviation from developmental norms.
Trainees memorize adult symptom thresholds and then pattern-match salient behavior to those thresholds; base rates of transient developmental symptoms are underweighted, and the exam vignette rewards naming a disorder.
What to do instead
Before assigning a diagnosis, compare the symptom to age-specific norms, require impairment in more than one setting, obtain parent and teacher descriptions, and document the developmental trajectory; when findings are equivocal, use watchful waiting with explicit safety-net criteria rather than a label.
Applying adult criteria duration and threshold requirements to children, such as diagnosing major depressive disorder in a preschooler from two weeks of sadness plus anhedonia, or labeling chronic irritability as bipolar disorder without applying DMDD age, duration, frequency, and setting criteria.
Adult-trained diagnostic scripts are overlearned, and exam items often present symptom lists that invite checklist matching rather than age-specific criteria application.
What to do instead
Map each symptom to its developmental expression, apply DSM age-specific criteria explicitly (for DMDD: age 6 to 18, irritability for at least 12 months, outbursts at least three times weekly, present in at least two settings), and verify duration, frequency, and impairment before selecting a diagnosis.
Making a diagnosis from a single informant, typically the parent, and not obtaining teacher or school data when evaluating ADHD, oppositional defiant disorder, anxiety, or autism spectrum disorder.
Parents are usually the gatekeeper in clinic, teacher rating scales take time to collect, and the visit feels complete once the parent's narrative is coherent.
What to do instead
Use multi-informant assessment routinely: parent and teacher rating scales, school observation or phone contact when indicated, and a structured or semistructured interview; explicitly document informant discrepancies and weigh them rather than silently choosing one source.
Attributing new withdrawal, irritability, sleep change, self-injury, or psychosis to autism spectrum disorder or intellectual disability without evaluating for depression, OCD, trauma, psychosis, or a medical cause.
Diagnostic overshadowing occurs when a salient neurodevelopmental label explains all behavior, and clinicians may not have a baseline of the child's usual functioning.
What to do instead
Establish the child's baseline and current change, use an adapted psychiatric interview and collateral sources, screen for depression, anxiety, OCD, trauma, and psychosis, review medical contributors, and track target symptoms with a measurable outcome rather than attributing all change to the underlying developmental disorder.
Diagnosing ADHD, oppositional defiant disorder, or bipolar disorder in a child with disruptive behavior and starting medication without a trauma and placement history, especially in foster care or child welfare populations.
Disruptive behavior is the most visible complaint, trauma symptoms such as hypervigilance, irritability, and inattention overlap with ADHD and ODD, and trauma screening is often not built into the intake.
What to do instead
Take a routine trauma and placement history, apply PTSD criteria when indicated, assess caregiver stability and safety, and sequence treatment so trauma-focused psychotherapy and environmental stabilization are considered before or alongside symptom-targeted medication.
Confusing tics, stereotypies, compulsions, and medication-induced akathisia, for example calling repetitive hand movements OCD, missing a premonitory urge, or overlooking akathisia after starting an antipsychotic.
These phenomena look similar on the surface, and clinicians often do not characterize quality, suppressibility, urge, timing, and medication relationship.
What to do instead
Describe the phenomenology: tics are suppressible with a premonitory urge and fluctuate; stereotypies are earlier, more continuous, and less suppressible; compulsions are driven by obsessions or rules; akathisia is a medication-temporal sense of restlessness. Use standardized scales and review the medication timeline.
Using adult starting doses and schedules for child psychotropics, or starting an antipsychotic without baseline and follow-up metabolic monitoring, such as starting fluoxetine at an adult dose in a young child or failing to check BMI, blood pressure, lipids, and glucose.
Adult dosing templates are overlearned, child pharmacokinetics and CYP ontogeny are less familiar, and monitoring is easily lost in a busy visit.
What to do instead
Use approved age-specific starting doses and titration (for example, start fluoxetine at 10 mg in a child), account for weight and developmental pharmacokinetics, obtain baseline metabolic and cardiac data when indicated, schedule follow-up monitoring, and document informed consent and side-effect review.
Attributing acute fluctuating confusion, hallucinations, or agitation to a primary psychiatric disorder without checking vital signs, medications, recent medical illness, or a focused neurologic examination, thereby missing delirium or a medical mimic such as thyroid disease, sleep apnea, seizure, or steroid effect.
Psychiatric anchoring and an incomplete review of systems make the psychiatric explanation feel sufficient, especially when the child has a known psychiatric history.
What to do instead
Screen for delirium with attention and fluctuation, review all medications and recent medical changes, obtain vital signs and a focused neurologic examination, and order targeted laboratory or EEG studies when the onset, course, or examination is atypical.
Selecting a psychotherapy modality by clinician familiarity or availability rather than by evidence and developmental fit, such as using insight-oriented therapy for pediatric OCD without exposure and response prevention or treating separation anxiety without parent involvement.
Training identifies with a preferred orientation, access to evidence-based child therapies is limited, and sessions can feel productive without measuring target symptoms.
What to do instead
Match treatment to the disorder and developmental level: CBT with ERP for OCD, parent management training for disruptive behavior, parent-child interaction therapy for young children, trauma-focused CBT for PTSD, and family involvement when accommodation maintains symptoms; measure target symptoms and adjust if there is no response.
Treating the child in isolation while family accommodation, parental psychiatric illness, school refusal, or system problems maintain the symptoms, or providing a consultation without clarifying the referral question and communicating recommendations to the medical team, school, and family.
Individual-focused training and fragmented systems make it easier to focus on the child's symptoms than on family patterns, school context, and care coordination.
What to do instead
Conduct a family and systems assessment, identify accommodation and maintaining factors, obtain collateral from school and medical teams, state the consultation question explicitly, provide written recommendations, and document who is responsible for follow-up and communication.