Lecture 1 Notes: Disorders of Childhood

Overview and context

  • Topic: Disorders of childhood (Lecture 1) with noted overlap and differences from adult psychopathology; emphasis on childhood presentation and developmental context.
  • Presenter: Hamish Love; previously covered personality, dissociative disorders; this unit emphasizes how childhood disorders tie to, yet differ from, adult conditions.
  • Key idea: Developmental milestones, neurological and social development, and familial/environmental context are central to understanding childhood psychopathology and its course into adulthood.
  • Acknowledged domains not deeply covered here but important for broader study:
    • Hakomi character theory as a potential framework illustrating how unmet developmental milestones can seed maladaptive personality traits; not part of the unit but offered as an optional reading.
  • Central questions raised:
    • Why do prevalence figures vary so much across sources? true prevalence vs increased assessment/recognition; criteria breadth; cultural and milestone appropriateness; and cross-national differences.
    • How do DSM-5 criteria and cross-cultural norms influence diagnosis in childhood vs adulthood?
    • How do social and developmental contexts alter presentation and impairment, not just symptom counts?
  • Why study childhood disorders? They involve rapid physical, hormonal, neural development and social changes; early recognition and screening are crucial; treatment typically involves families, schools, and broader systems; there are legal/ethical/safety considerations unique to children.
  • Conceptual framing and links to prior material:
    • The unit connects to earlier discussions about how childhood risk factors and familial/environmental factors contribute to later psychopathology, including roots of personality disorders.
    • Five P’s of case conceptualization (from a previous lecture) remain relevant for integrating biology, psychology, and context in pediatric cases.
  • Scope of diagnoses in this lecture: focuses on DSM-5 childhood disorders, with attention to two broad groups:
    • Externalising disorders (outward, behavioral/conduct-related issues)
    • Internalising disorders (inward experiences like anxiety and depression)
  • Contextual prevalence graphic (from textbook/therapeutic agencies): overview of common childhood disorders in Australia (data circa 2013–2014):
    • ADHD: 7.5\%
    • Anxiety disorders: ≈7\%
    • Major depressive disorder: ≈3\%
    • Conduct disorder: ≈2\%
    • Note: figures vary by source, population, measures, and year; interpret with caution; more current figures may differ.
  • In-class notes emphasize that prevalence data are often US-centric and influenced by diagnostic thresholds, cultural norms, and milestone expectations.
  • Two broad diagnostic axes in childhood psychopathology:
    • Externalising disorders: outward-directed, behaviorally disruptive issues affecting relationships and settings (home, school, peers).
    • Internalising disorders: inward experiences (mood, anxiety, fear) affecting thoughts, feelings, and internal functioning.
  • General prevalence themes:
    • ADHD is commonly the most prevalent neurodevelopmental disorder in children/adolescents.
    • Anxiety and depression are prevalent internalising disorders, with distinct developmental patterns.
    • Conduct-related and oppositional disorders intersect with externalising presentations and carry implications for aggression, rule-breaking, and interpersonal functioning.
  • Developmental and cultural considerations:
    • Milestones and cultural expectations shape what is considered normative vs problematic behavior.
    • Diagnosis in childhood may involve broader systems (parents, schools, communities) and safeguarding considerations.
    • Treatment approaches often require coordination with families, teachers, and communities rather than only the individual.
  • Therapeutic landscape and evidence base:
    • Pharmacological and non-pharmacological treatments co-exist for disorders like ADHD; ongoing debates exist about risks/benefits in children.
    • Behavioral therapies, parent-management training, and school-based interventions are frequently emphasized.
  • Ethical and safety considerations:
    • Privacy, consent, and safety take on heightened significance in pediatric contexts; the state/family roles in treatment decisions may differ from adults.
    • Children’s neurodevelopmental plasticity can imply potential for change with supports, but also sensitivity to interventions.
  • Quick note on scope: feeding and eating disorders are acknowledged but not the focus here; the emphasis remains on ADHD, conduct-related disorders, and internalising conditions (depression, anxiety, separation anxiety).

Learning outcomes and structure of this lecture

  • Learning outcome 1 (Foundational aspects): key issues and considerations in diagnosing psychopathology in children.
  • Learning outcome 10.2: externalising disorders (etiology, presentation, presenting problems) with reference to the 5 P’s of case conceptualization.
  • Learning outcome 10.3: internalising disorders (description and etiology).
  • Preview of next lecture’s Part 2: learning outcomes addressing learning disorders, intellectual disabilities, and autism.
  • Core takeaway: childhood disorders arise from a dynamic interplay of behavioral, cognitive, genetic, neurobiological, and social factors, and treatment planning typically involves a broad support network.

Prevalence, assessment, and cross-cultural considerations

  • Prevalence variability:
    • Large variation across sources; some argue prevalence is rising due to better assessment and recognition, others argue true prevalence is increasing.
    • Broad vs narrow criteria, and culture/ milestone appropriateness influence estimates.
  • Cross-cultural lens:
    • DSM-5 criteria may map differently onto social and cultural norms; behaviors considered typical in one culture may be concerning in another.
    • Milestones (developmental expectations) can differ by locale; what is appropriate at a given age varies across cultures.
  • Data caveats:
    • Many prevalence figures reported in literature derive from US data; direct generalization to other countries may be inappropriate without local norms.
    • When interpreting numbers, maintain a critical stance about methodology (sample, measures, and settings).

Two broad diagnostic dimensions in childhood psychopathology

  • Externalising disorders: outward behaviors impacting relationships and environments (impulsivity, hyperactivity, aggression, noncompliance).
  • Internalising disorders: inward experiences (depressed mood, anxiety, withdrawal).

Externalising disorders: overview and key examples

  • ADHD (Attention-Deficit/Hyperactivity Disorder)

    • Prevalence flag: among childhood disorders, ADHD is highly prevalent; estimates reach up to 17\% in some populations.
    • Developmental course: commonly diagnosed in children; average age of diagnosis often between 5-9 years; comorbidity with autism common in some samples; ADHD diagnoses in adulthood have risen in recent years (noted as about 4\times higher in adults than in children in some 2016 data, reflecting catch-up in recognition).
    • Presentation: core domains include inattention and hyperactivity/impulsivity; symptoms may be present in multiple settings (home, school, social contexts).
    • DSM-5 criteria (child/adolescent): at least 6 manifestations of inattention and at least 6 manifestations of hyperactivity-impulsivity; symptoms prior to age 12; there must be impairment across more than one setting; duration > 6 months.
    • Adult thresholds: for adults (> 17 years), the threshold is lower, with at least 5 symptoms required.
    • Symptom patterns:
    • Inattention: difficulty sustaining concentration, starting tasks, or switching attention; can involve cognitive fatigue and racing thoughts.
    • Hyperactivity/impulsivity: motor overactivity, fidgeting, talking, difficulty waiting turns, impulsive decisions.
    • Subtypes (DSM-5):
    • Predominantly inattentive presentation (historically termed ADD; now ADHD, inattentive type).
      • Predominant issues: organization, time management, sustained attention; potential for exhaustion and cognitive load; HBoth mood and anxiety overlap possible.
    • Predominantly hyperactive-impulsive presentation.
    • Combined presentation (most common): meets criteria for both inattention and hyperactivity-impulsivity.
    • Onset and settings: must be present before 12; across contexts (home, school, peers) for diagnosis.
    • Comorbidity and differential considerations:
    • High comorbidity with conduct disorder, learning disorders (e.g., dyslexia, dyscalculia), and internalising disorders like anxiety.
    • Distinguishing ADHD from anxiety or mood symptoms is important; sometimes anxiety mimics or co-occurs with ADHD.
    • Gender differences:
    • Boys diagnosed more often than girls (roughly 3:1 ratio in many samples), which may reflect biological/rendering differences or diagnostic biases (girls may be better at masking hyperactive-impulsive symptoms).
    • Epidemiology and cross-national differences:
    • Higher prevalence in higher-income countries; potential explanations include testing availability, healthcare access, and environmental factors.
    • Etiology (risk factors):
    • Diathesis-stress model: predisposition plus environmental systems (family, school) contribute to development and maintenance.
    • Prenatal and perinatal factors: alcohol/tobacco exposure, prematurity, low birth weight.
    • Diet and lifestyle: controversial; some clinicians report drug/diet effects on symptom severity; more research needed.
    • Treatment approaches:
    • Pharmacotherapy: short-acting stimulants (e.g., 4-6 hours duration) like Adderall and Ritalin; long-acting formulations (e.g., Vyvanse, Concerta) for 6-12 hours or longer; combinations and “extended-release” versions exist.
    • Psychosocial/interventions: behavioral therapies, parent training (parent management), teacher training, school-based interventions, and broader systemic approaches; dopaminergic system involvement in reward/motivation discussed as a potential neurobiological mechanism.
    • Diet and lifestyle: some report self-medication via dietary changes (sugary/refined carbohydrates); evidence mixed; still considered supportive in some cases.
    • Controversies and cautions:
    • Debate about long-term effects of stimulant medications; monitoring required; important to weigh benefits vs risks in pediatric brains.

  • Conduct Disorder

    • Prevalence: around 8\% overall; higher in males (≈11\%) than females (≈7\%) in US samples.
    • Core features: persistent patterns of violating rights of others and social norms; aggression toward people/animals; destruction of property; deceit/theft; serious violation of rules (often before age 13).
    • Onset: typically adolescence; possible earlier onset but peak in late childhood to adolescence (roughly 10-19 years).
    • impairment: clinically significant across multiple contexts (home, school, social, occupational); requires several criteria across the past 12 months, with disorder-specific thresholds.
    • Etiology and risk factors:
    • Interplay of social factors (neglectful parenting, exposure to substance abuse, parental antisocial behavior) and genetic predisposition; neurobiological contributors (e.g., higher testosterone, frontal-lobe control issues, traumatic brain injury) associated with poorer impulse control and aggression.
    • Family environment factors (safe attachment, boundaries, autonomy needs) interact with risk; low socioeconomic status increases risk.
    • Treatment and management:
    • Core approach includes parent management training, group therapy, CBT-based anger management, and community-based wraparound supports; addressing multiple contexts is essential.
    • Comorbidity and differentiation:
    • High comorbidity with ADHD and learning disorders; overlap with anxiety and mood symptoms possible; differential diagnosis requires careful assessment to distinguish ADHD-related impulsivity from conduct problems.

  • Intermittent Explosive Disorder (IED)

    • Brief note: similar to conduct disorder in presenting aggression, but IED emphasizes recurrent, disproportionate verbal or physical outbursts that are reactive rather than premeditated.

  • Oppositional Defiant Disorder (ODD)

    • Prevalence estimates vary widely (≈1-11\% in US data; commonly reported around 2-3\%).
    • Distinctive feature: patterns of angry/irritable mood, argumentative/defiant behavior, and vindictiveness directed mainly at authority figures (not generalizable across all settings).
    • Relationship to conduct disorder: may be a precursor or milder form of conduct disorder; often conceptualized as an initial or milder phase.
    • Clinical presentation considerations:
    • Ego-syntonic in many youths: they view themselves as justified, blaming others or authority for demands.
    • Co-occurrence with ADHD and anxiety/mood disorders is common.

Internalising disorders: overview and key examples

  • Depression (Major Depressive Disorder in youth)
    • Commonalities with adults: depressed mood, anhedonia, fatigue, concentration problems; suicidality remains a critical risk area.
    • Differences in children/adolescents:
    • Increased guilt relative to adults; sleep disturbance and appetite changes may be less prominent in children than in adults.
    • Epidemiology and risk factors:
    • US data suggest about 1.6-2.0\% in girls and 1.2\% in boys (younger children); risk rises in adolescence, with girls at higher risk than boys.
    • One in five adolescents may meet criteria for major depressive disorder in some US samples.
    • Risk factors include parental depression, adverse childhood experiences (ACE; testable with the ACE questionnaire), family conflict, social stressors, and puberty-related changes.
    • Protective factors include safe and stable environments, adequate sleep, good nutrition, regular exercise, sunlight exposure, and supportive caregiving.
    • Etiology and mechanisms:
    • Genetic contribution present; heritability estimates applicable to childhood depression.
    • Environmental stressors and life events (e.g., parental illness, relocation) contribute.
    • Treatment considerations:
    • Antidepressants may be efficacious but carry concerns about side effects and suicidality risk in children; regulatory bodies (e.g., TGA in Australia) exercise caution; most antidepressants are not formally approved for pediatric use except for OCD indications (e.g., fluvoxamine, sertraline for OCD in children ages 6–8).
    • Off-label prescribing occurs; requires close monitoring due to developmental considerations and risk/benefit balance.
    • Psychotherapy, especially CBT and family-focused approaches, is a cornerstone; including CBT with graded exposure where appropriate and group CBT for social aspects.
  • Anxiety disorders (in children and adolescents)
    • Prevalence: second to ADHD in many datasets; prevalent and impactful on functioning and development.
    • Etiology and risk factors:
    • Heritability estimates roughly 29-50\%, with environmental contributions related to safety and parenting styles.
    • Treatment: CBT and graduated exposure; group CBT helpful for social dimensions; early identification improves outcomes.
    • Clinical implications: anxiety can limit educational and social opportunities if untreated.
  • Separation Anxiety Disorder
    • A specific internalising issue that has been opened up to pediatric and adult descriptions:
    • Diagnostic criteria in children (lasts >4\ weeks): distress with separation from primary caregiver; excessive worry about caregiver’s safety; refusal or reluctance to go to places away from caregiver; nightmares about separation; physical complaints when separated.
    • In adults, criteria typically extend to >6\ months.

Etiology, risk factors, and protective factors across childhood disorders

  • Broad etiological themes:
    • Genetic predispositions and heritable patterns, including temperament and neurobiological factors.
    • Neurobiological and brain development considerations (e.g., frontal lobe function and dopaminergic reward pathways implicated in ADHD and conduct problems).
    • Environmental and social factors: parenting styles (supportive vs harsh/neglectful), family dynamics, socio-economic status, exposure to trauma or instability, school environment, and peer influences.
    • Prenatal and perinatal risks: prenatal exposure to substances (alcohol, tobacco), prematurity, low birth weight.
  • Protective and resilience factors:
    • Safe, stable, and predictable home and school environments; good sleep, nutrition, exercise, sunlight; supportive relationships with caregivers and teachers.
    • Early screening, early intervention, and coordinated care across home, school, and community settings.

Diagnostic criteria and clinical thresholds (DSM-5 emphasis)

  • ADHD (child/adolescent)
    • At least 6 manifestations of inattention and at least 6 manifestations of hyperactivity-impulsivity; present before age 12; across multiple settings; duration >6 months; impairment present.
    • Subtypes: inattentive (no hyperactivity/impulsivity to a level meeting threshold), hyperactive-impulsive (sub-threshold in one domain), and combined (both domains meet criteria).
    • For adults (>17 years): threshold reduces to at least 5 symptoms.
  • Conduct Disorder
    • Requires at least 3 of the specified behaviors (from the DSM-5 list) in the last 12 months, with at least one criterion present in the last 6 months; impairment across contexts; patterns of aggression, property destruction, deceit/theft, and serious rule violations before age 13.
  • Oppositional Defiant Disorder (ODD)
    • Pattern of angry/irritable mood, argumentative/defiant behavior, and vindictiveness lasting at least 6\ months; directed primarily at authority figures; often co-occurs with ADHD and anxiety/depression.
  • Internalising disorders
    • Depression: duration, impairment, and developmental considerations; suicidality risk requires careful monitoring; medication use controversial and tightly regulated in children.
    • Anxiety disorders: CBT and exposure-based strategies; group formats for social anxiety; familial factors and safety perceptions important.
    • Separation anxiety: distinct in children; less common as a long-term pediatric diagnosis; adult presentations require different thresholds.

Treatment approaches and practical considerations

  • ADHD treatment spectrum:
    • Pharmacotherapy: stimulant medications with short-acting and long-acting formulations; dosing and monitoring are critical; weigh risks vs benefits in developing brains; consider comorbidity when selecting therapy.
    • Non-pharmacological approaches: broad behavioral interventions; parent training; teacher collaboration; school-based supports; lifestyle modifications (diet, sleep, exercise) as adjuncts.
    • Theory-to-practice note: dopamine dysregulation is discussed as a potential neurobiological mechanism; treatment aims to optimize reward/motivation processes and reduce maladaptive impulsivity.
  • Conduct Disorder and ODD: treatment emphasis on behavior management and family systems
    • Parent management training, individual CBT focused on anger and aggression, and group/community-based interventions.
    • Address social determinants (socioeconomic factors, caregiver stress) that contribute to risk and maintenance.
  • IED: management usually involves CBT and anger management strategies, with attention to context and triggers.
  • Depression in youth: psychotherapy first-line in many cases; pharmacotherapy considered with caution; close monitoring for suicidality and adverse effects; family involvement important.
  • Anxiety in youth: CBT with graded exposure; group formats for social anxiety; preventive and early intervention strategies are effective.
  • Separation anxiety: CBT-focused approaches and family-based strategies; ensure developmental appropriateness and cultural considerations.
  • General treatment considerations:
    • Multimodal and multi-system approaches are common; success often requires collaboration among families, schools, clinicians, and community resources.
    • Regular re-evaluation and adjustment of treatment plans; attention to potential side effects (especially with medications) and ethical considerations in treatment of minors.

Ethical, developmental, and practical implications

  • Consent and assent: children’s capacity to participate in decisions about treatment, with guardians providing consent and the child providing assent where feasible.
  • Safety and safeguarding: higher stakes in childhood contexts; privacy protections and reporting responsibilities for suspected abuse or danger.
  • Neuroplasticity and prognosis: greater potential for change with early intervention; some disorders may remit or shift over time with development and supports, though some persist into adulthood.
  • Cultural context: diagnostic thresholds and interpretation should consider cultural norms about behavior, authority, and child-rearing practices; cross-cultural validity of criteria remains a critical consideration.
  • Research and evidence needs: ongoing debate about medication effects, long-term outcomes, and the relative effectiveness of pharmacological vs behavioral approaches; cautious interpretation of correlational studies (e.g., antidepressants and suicidality signals).

Connections to broader course material and future topics

  • Recap of continuity: roots of adult psychopathology in childhood factors; how early experiences shape later personality and psychiatric outcomes.
  • Next steps: Part 2 of Lecture 8 will cover learning disorders, intellectual disability, and autism in more depth; this lecture lays the groundwork for understanding where those conditions fit within the DSM-5 framework and how they interact with the disorders discussed here.
  • Textbook and references: figures and prevalence data referenced (e.g., Australian TGA data, 2013–2014) should be cross-checked with the current edition and local epidemiological work; always consult the textbook for exact figures and context.

Quick summary of key numeric benchmarks to remember

  • ADHD DSM-5 criteria (child/adolescent): at least 6 inattention manifestations and at least 6 hyperactivity/impulsivity manifestations; duration >6 months; present before 12; impairment across settings.
  • Adult ADHD threshold (age > 17): at least 5 symptoms required.
  • ADHD prevalence in childhood (varies by source): up to ext{around }17\% in some samples; earlier US estimates ranged from around 7.8\% to 11\% in different waves.
  • ADHD gender ratio frequently reported ~3:1 (boys:girls).
  • ADHD age of diagnosis: commonly 5-9 years; autism around 3-6 years.
  • Conduct Disorder general population prevalence: around 8\%; boys higher (~11\%) than girls (~7\%).
  • Oppositional Defiant Disorder prevalence estimates range broadly around 1-11\% in US data, commonly cited 2-3\%.
  • Depression pediatric prevalence (girls higher than boys): about 1.6-2.0\% girls and 1.2\% boys; adolescent rates higher, with some studies finding up to 20\% in teens for depressive disorders.
  • Anxiety disorder prevalence in youth: typically among the top two externalising/internalising, with heritability estimates around 29-50\% and substantial environmental contributions.
  • Separation anxiety criteria in children: symptoms lasting >4\ weeks; in adults, typically >6\ months.

References and prompts for further study

  • Review the DSM-5 criteria for ADHD, ODD, conduct disorder, separation anxiety, and pediatric depression/anxiety in your textbook and DSM-5 handouts.
  • If interested, explore Hakomi character theory as a supplementary lens for developmental trajectories and temperament.
  • Consider how 5 P’s of case conceptualization would apply to a pediatric case involving ADHD or conduct disorder (e.g., Predisposing, Precipitating, Perpetuating factors, Protective factors, and Presenting problems).
  • Look up the Therapeutic Goods Administration (TGA) data for Australia and compare with US/EU prevalence figures to understand cross-national differences in diagnosis and reporting.

Wrap-up

  • This lecture establishes foundational concepts for diagnosing and understanding childhood psychopathology, with emphasis on externalising vs internalising disorders, their presentations, etiologies, and treatment options.
  • It sets the stage for deeper exploration of learning disorders, intellectual disability, and autism in the next session.