Notes: Theories and Causes in Child Psychopathology (Chapter 2)

Bronfenbrenner’s Ecological Model

• Core idea: the child’s environment is a series of nested and interconnected structures with the child at the center.
• Contexts include proximal (close by) and distal (further removed) events that influence development and behavior.
• Shared vs nonshared environments: factors that produce similarities among siblings in the same family vs. factors that produce differences.
• The model emphasizes multiple, interacting systems rather than a single cause.
• Practical implication: interventions should consider multiple levels of influence, from family to broader cultural context.

Developmental Psychopathology Perspective

• Atypical development is multiply determined; one must look beyond current symptoms to understand developmental pathways and interacting events that contribute over time.
• Transactional view: children and environments are interdependent and actively shape each other (child and environment are both active contributors).
• Continuities and discontinuities:
  • Continuity: gradual, quantitative changes that can predict future behavior patterns.
  • Discontinuity: abrupt, qualitative changes that may not predict future patterns.
• Developmental cascades: previous interactions and experiences can spread across systems and alter development trajectories.

Integrative Approach

• No single theoretical orientation explains all aspects of child behavior or disorders.
• Even multi-theoretical models are bounded by their discipline; combining perspectives enriches understanding but remains limited by boundaries.
• Atypical child behavior is best studied from a multi-theoretical perspective.
• Knowledge accumulates through ongoing research.

Knowledge Check: Assumptions of Child Development

• Multiple main assumptions discussed in the chapter include:
  • The child and the environment are not independent; development is multiply determined (not solely genetic or environmental).
  • Development is interdependent: children and their environments mutually influence each other.
  • Maladaptive development involves both continuities and discontinuities over time.

Developmental Considerations

• Adaptational failure: unsuccessful progress in developmental milestones.
• Organization of development perspective: early patterns of adaptation organize into higher-order functions over time.
• Sensitive periods: windows during which environmental influences have enhanced effects on development (both beneficial and harmful).
• These concepts help explain why timing and context matter for risk and resilience.

Biological Perspectives

• Neurobiological perspective: the brain is a central source of risk and resilience; biological processes interact with experience.
• Brain development begins with all-purpose cells that differentiate into neurons and form synapses; neural connections are experience-dependent (neural plasticity).
• Both nature and nurture contribute; experience shapes brain development.

Neural Plasticity and the Role of Experience (1 of 2)

• Neural plasticity: the brain’s anatomical differentiation is use-dependent; experience shapes neural circuits.
• Critical role of experience in shaping brain development across development.
• Maturation timeline important for function:
  • Basic sensory and motor areas mature in the first $3$ years ($3$ years).
  • Perceptual and instinctive centers are strongly affected by early experiences.
  • Prefrontal cortex and cerebellum are not heavily rewired until about $5 ext{ to } 7$ years (
    $5 ext{ to } 7$).
  • Major restructuring occurs around puberty (ages $9 ext{ to } 11)$ due to pubertal development and again in adolescence.
• Consequences of traumatic experiences can be long-lasting and difficult to change; early experiences shape risk for later disorders.
• Safeguards (prenatal care, nutrition, avoiding tobacco/alcohol during pregnancy) help reduce risk of lifelong complications.

Neural Plasticity and the Role of Experience (2 of 2)

• Early traumatic experiences are more strongly linked to later organic complications than later events, underscoring the importance of early environment.
• Imaging evidence (e.g., MRI) illustrates brain pathways and connectivity, illustrating how development may diverge with different experiences.

Neurobiological Contributions: Brain Structures and Functions

• Brain structure and function contribute to behavior and psychopathology.
• Major brain areas discussed include:
  • Brainstem: hindbrain (autonomic regulation), midbrain (movement and arousal via reticular activating system, RAS).
  • Diencephalon: thalamus and hypothalamus (relay and regulation of behavior and emotion).
  • Forebrain: limbic system, basal ganglia, cerebral cortex (frontal lobes and other lobes).
• These regions work together to regulate arousal, emotion, cognition, and behavior; disruptions can relate to psychopathology.

The Brainstem, Limbic System, and The Lobes of the Brain

• Brainstem and limbic system: foundational for autonomic regulation, emotion, and early learning.
• Lobes of the brain: major cortical regions involved in higher-order processes (planning, reasoning, impulse control, etc.).
• Practical implications: different brain regions contribute to different functions and vulnerability profiles in psychopathology.

The Endocrine System and Hormones

• The endocrine system influences anxiety and mood disorders.
• Key glands and hormones:
  • Adrenal glands produce epinephrine (adrenaline) and cortisol.
  • Thyroid gland produces thyroxine.
  • Pituitary gland produces regulatory hormones, including estrogen and testosterone.
• Hypothalamic–pituitary–adrenal (HPA) axis: a key hormonal pathway linked to several disorders, especially anxiety and mood disorders.

Neurotransmitters and Psychopathology

• Neurotransmitters create biochemical connections between neurons and support brain circuits.
• Major neurotransmitters involved in psychopathology include:
  • Benzodiazepine-GABA: reduces arousal and moderates emotional responses; linked to anxiety disorders when dysregulated.
  • Dopamine: acts as a switch that helps activate or inhibit other circuits; implicated in schizophrenia, mood disorders, and ADHD.
  • Norepinephrine: supports emergency reactions and emotional/behavioral regulation; generally modulates tendencies rather than causing specific disorders.
  • Serotonin: involved in information processing and motor coordination; influences eating, sleeping, anger expression; implicated in OCD, schizophrenia, and mood disorders.
• Regulatory concerns (e.g., eating, sleeping) are commonly linked to serotonin and related systems.

Table 2.1 (Neurotransmitters) — Quick Reference (Conceptual Summary)

• For each neurotransmitter:
  • Typical functions
  • Implicated roles in psychopathology
• The table emphasizes that multiple neurotransmitter systems contribute to a range of disorders; dysregulation across systems is common rather than a single-cause model.

Psychological Perspectives

• Psychological perspectives add value by focusing on transactions and development of emotion, behavior, and cognition.
• Emotions play a central role in early adaptation and in how children perceive and respond to their world.
• Behavioral and cognitive processes help children interpret events and guide behavior.

Emotions and Emotion Regulation

• Emotions and affective expression are core elements of human experience and a central feature of infant regulation.
• Emotions inform attention and learning; they influence the quality of social interactions and relationships.
• Emotion reactivity vs regulation:
  • Reactivity: thresholds and intensity of emotional responses.
  • Regulation: strategies to enhance, maintain, or inhibit arousal.
• Regulation vs dysregulation: typical development features include the child–caregiver relationship; authoritative parenting supports healthy limits and structure.

Temperament and Early Personality Styles

• Temperament: an organized, early-appearing style of behavior that shapes how a child interacts with their environment.
• Three primary dimensions:
  • Positive affect and approach
  • Fearful or inhibited
  • Negative affect or irritability
• Early infant temperament can be linked to later psychopathology or risk conditions.
• Empirical links exist between early behavioral styles and adult personality characteristics.
• Self-regulation: balance between emotional reactivity and self-control.
• Personality disorders are rarely diagnosed before late adolescence or early adulthood; there are ten personality disorders with shared criteria.

Behavioral and Cognitive Influences

• Applied Behavior Analysis (ABA): behavior is a function of antecedents and consequences.
• Classical conditioning: pairing of previously neutral stimuli with unconditioned stimuli.
• Social learning and cognition: learning through observation and potential cognitive mediators.

Reflection Activity (Class Exercise)

• Example of vicarious learning: observe a model and imitate or avoid behaviors based on the model’s actions.
• Consider how feelings toward the model influence learning; think of instances where you were a model for others.

Family, Social, and Cultural Perspectives

• Social and environmental contexts include both proximal and distal influences (same as ecological model).
• Shared environment: factors that produce similarities in siblings’ development within the same family.
• Nonshared environment: factors that produce differences among siblings within the same family.
• These contexts shape developmental outcomes and risk for psychopathology.

Bronfenbrenner’s Ecological Model (Revisited)

• The child’s environment consists of nested, interconnected systems with the child at the center.
• Contexts include family, school, peers, community, culture, and policies that interact across time (chronosystem).

Infant–Caregiver Attachment

• Attachment: the process of establishing and maintaining an emotional bond with caregivers or significant others.
• Four standard patterns:
  • Secure
  • Insecure—anxious-avoidant
  • Insecure—anxious-resistant
  • Disorganized, disoriented (not an organized strategy)
• Insecure attachments are implicated in various childhood disorders, influencing later relationships and regulation.

The Family and Peer Context

• Family systems theory: understanding a child’s behavior requires looking at the family system and dynamics, not just the individual.
• Studying individual factors alongside the child’s context is mutually informative for theory and intervention.
• How a family unit handles typical and atypical stress significantly affects children’s adjustment and adaptation.

Intervention and Practical Implications (derived from the chapter themes)

• Intervention targets should consider multiple levels: individual, family, peer, school, and broader culture.
• Early identification and safeguarding (prenatal care, nutrition, avoiding harmful substances) can reduce risk.
• Promoting healthy emotion regulation, self-regulation, and adaptive attachment patterns can support better outcomes.
• Understanding that psychopathology often arises from multiple interacting factors encourages multi-system strategies rather than single-cause treatments.

Summary and Key Takeaways

• Bronfenbrenner’s ecological perspective emphasizes the brain, biology, behavior, and multiple social/systems influences on child development.
• Three core assumptions about child development: it is multiply determined; the child and environment are interdependent; and maladaptive development involves continuities and discontinuities.
• Development is organized and can be analyzed through a developmental psychopathology lens that considers pathways, cascades, and multiple interacting causes.
• Neural plasticity and developmental timing mean experiences—and their timing—shape brain development and risk for disorders.
• Biological factors (genetics, neurobiology, neurotransmitters, endocrine systems) interact with psychological processes (emotion, temperament, learning) and social context (family, peers, culture) to influence child psychopathology.
• An integrative, multi-theoretical approach provides the most comprehensive framework for understanding and addressing child mental health concerns.