Notes on Conduct Disorder and Impulse Control Disorders

Continuum of Conduct and Impulse Control

• Disorders discussed involve disruptive, impulsive, and antisocial behavior that violates major social norms.
• The continuum ranges from Healthy/Functional to Dysfunctional, with various levels of rule-following, empathy, and antisocial behavior.
• Core idea: biological and psychosocial factors contribute to both everyday misbehavior and diagnosable disorders.
• Four disorders covered (childhood-onset to adult-onset): Oppositional Defiant Disorder (ODD), Conduct Disorder (CD, childhood/adolescent onset), Intermittent Explosive Disorder (IED), and Antisocial Personality Disorder (ASPD).

Conduct Disorder and Oppositional Defiant Disorder (ODD)

• ODD: chronic negativistic, defiant, hostile behavior limited to one or more settings; not typically aggressive toward animals/people or property destruction; impairment in social function.
• CD: more severe/ant antisocial behavior that violates rights of others and rules; onset in childhood/adolescence; can portend later ASPD.
• Distinction: some CD behaviors begin in childhood; others emerge in adolescence; specifiers influence prognosis.

DSM-5-TR Criteria for Conduct Disorder (Table 1 overview)

• A. Repetitive and persistent pattern of behavior violating basic rights of others or major norms, with at least 3 of 15 criteria in the past 12 months, at least one in the past 6 months:
  • Aggression to people and animals
  1. Often bullies, threatens, or intimidates others
  2. Often initiates physical fights
  3. Has used a weapon that can cause serious physical harm to others
  4. Has been physically cruel to people
  5. Has been physically cruel to animals
  6. Has stolen while confronting a victim
  7. Has forced someone into sexual activity
  • Destruction of Property
  1. Has deliberately engaged in fire setting with the intention of causing serious damage
  2. Has deliberately destroyed others' property
  • Deceitfulness or Theft
  1. Has broken into someone else's house, building, or car
  2. Often lies to obtain goods or favors or to avoid obligations
  3. Has stolen items of nontrivial value without confronting a victim
  • Serious Violations of Rules
  1. Often stays out at night despite prohibitions, beginning before age 13
  2. Has run away from home overnight at least twice
  3. Is often truant from school, beginning before age 13
• B. Impairment in social, academic, or occupational functioning.
• C. If age ≥18, criteria are not met for antisocial personality disorder.

Specifiers and Related Concepts

• With limited prosocial emotions (specifier): applies to those who meet full CD criteria and show at least two of the following across relationships/settings:
  • (a) lack of remorse or guilt
  • (b) lack of empathy for others (callousness)
  • (c) lack of concern about performance at school/work
  • (d) shallow or deficient emotions
• Callous/unemotional presentation: less reactive to fear/distress, less sensitivity to punishment; linked to psychopathy.
• Psychopathy: a more severe pattern (often studied in adults) characterized by fearless, manipulative, and cruel behavior; predictor of worse outcomes.

Development, Prevalence, and Risk Factors

• Childhood-onset vs adolescent-onset conduct disorder (DSM-5-TR specifier): childhood-onset tends to persist into adulthood (life-course-persistent antisocial behavior).
• Life-course-persistent pattern: higher risk for long-term problems like unemployment, unstable relationships, chronic aggression, and possible ASPD.
• Prevalence (CD):
  • 2\text{--}5\% in children (5–12 years)
  • 5\text{--}9\% in adolescents (13–18 years)
  • Lifetime: \approx 12\% in males, \approx 7\% in females
• Ethnicity and race:
  • Lifetime prevalence: Latinx 6.9\%, Blacks 4.9\%, Whites 5.0\%
  • CD more common in African American children; ODD more common in White children (across ages)
• Socioeconomic and environmental factors: low SES, neighborhood context, and parenting practices influence risk.
• Inpatient risk: African American males <11 years old at higher risk of inpatient hospitalization for CD; comorbidity with psychosis and depression increases risk for hospitalization.
• Outcomes if early-onset CD: higher likelihood of persistent antisocial behavior, poorer mental/physical health, substance use problems, unemployment, and relationship issues in adulthood.
• CD is one of the strongest predictors of later antisocial outcomes (e.g., ASPD) when persistent.

Case Study: Phillip (Excerpt)

• Phillip, age 12, persistent disciplinary problems: fights, theft, rule-breaking, aggression, poor school achievement (average intelligence but performance at 3rd–4th grade level).
• Symptoms described: persistent aggression, defiance, blaming others, lack of friends, injured innocence rhetoric, sullen attitude.
• CD diagnosis considerations: early onset, chronic pattern, risk for progression to ASPD and related problems.

Developmental and Clinical Implications

• CD/ODD require careful staging by age of onset and course (childhood vs adolescence onset).
• Early intervention crucial to reduce risk of life-course-persistent antisocial behavior and associated comorbidities.
• Specifiers (limited prosocial emotions) help identify more severe, psychopathy-related trajectories.

Extraordinary Case Illustration

• Ted Bundy: extreme example of a psychopath/sociopath
  • Charming, intelligent, socially capable; used deception to approach victims
  • Engaged in serial murders with sadistic elements; evinced lack of remorse and manipulation
  • Demonstrates how antisocial behavior can be intensified by personality traits and cognitive skills
  • Highlights why identifying etiological factors is important for informing legal, social, and treatment responses

Implications of Etiology for Society

• All behavior is influenced by biological and psychosocial factors.
• Understanding causes informs approaches to prevention, treatment, and public policy for individuals who violate norms or harm others.