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👶Developmental Psychology

Kohlberg's Stages of Moral Development

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Why This Matters

Kohlberg's theory is one of the most frequently tested frameworks in Developmental Psychology because it illustrates how cognitive development shapes moral reasoning—a core principle you'll see across the AP exam. Understanding these stages helps you connect moral thinking to broader concepts like cognitive development, socialization, social influence, and cultural psychology. The exam loves to present moral dilemmas and ask you to identify which stage of reasoning a person is demonstrating, so you need to recognize the underlying logic, not just the stage name.

Here's the key insight: Kohlberg argued that moral development follows a predictable sequence tied to cognitive growth, but not everyone reaches the highest stages. The exam will test whether you understand why people reason differently at each level and how factors like age, culture, and gender influence moral thinking. Don't just memorize the six stages—know what motivates moral decisions at each level and be ready to critique the theory's limitations.


The Three Levels: A Framework for Moral Reasoning

Kohlberg organized his six stages into three broader levels, each representing a fundamentally different relationship between the self and moral rules. The progression moves from external control to internalized principles.

Pre-Conventional Level (Stages 1-2)

  • Self-focused reasoning—morality is defined entirely by external consequences and personal needs
  • Typical of children under age 9, though adults may regress here in high-stakes situations
  • No internalization of moral rules—right and wrong are determined by what happens to you

Conventional Level (Stages 3-4)

  • Society-focused reasoning—morality means conforming to group expectations and maintaining order
  • Most common in adolescents and adults—this is where the majority of people remain throughout life
  • Rules are accepted without question because they preserve relationships and social stability

Post-Conventional Level (Stages 5-6)

  • Principle-focused reasoning—morality transcends specific laws to embrace universal ethical standards
  • Achieved by a minority of adults—requires abstract thinking and willingness to challenge unjust systems
  • Individual conscience may override law when laws violate fundamental human rights

Compare: Pre-Conventional vs. Post-Conventional—both can lead to law-breaking, but for opposite reasons. A Stage 1 thinker breaks rules to avoid personal harm; a Stage 6 thinker breaks unjust laws based on universal principles. If an FRQ presents civil disobedience, distinguish why the person disobeyed.


Pre-Conventional Stages: Consequences Drive Decisions

At this level, moral reasoning is entirely egocentric. The child (or adult functioning at this level) hasn't internalized society's rules—they're just responding to external pressures.

Stage 1: Obedience and Punishment Orientation

  • Avoiding punishment is the primary motive—actions are "wrong" only if they result in negative consequences
  • Authority figures define morality—whatever parents, teachers, or powerful figures say is automatically right
  • Intentions don't matter—a child at this stage judges actions by outcomes, not by what someone meant to do

Stage 2: Self-Interest Orientation

  • "What's in it for me?" drives decisions—moral choices are calculated based on personal benefit
  • Reciprocity emerges, but it's transactional"I'll help you if you help me" rather than genuine fairness
  • Still egocentric reasoning—other people's needs only matter when they serve one's own interests

Compare: Stage 1 vs. Stage 2—both are self-focused, but Stage 1 is passive (avoiding punishment) while Stage 2 is active (seeking reward). A Stage 1 child won't steal because they'll get caught; a Stage 2 child won't steal unless they're sure they'll get something better in return.


Conventional Stages: Social Expectations Guide Behavior

The shift to conventional morality marks a major cognitive leap: the person now considers how their actions affect relationships and society, not just themselves.

Stage 3: Interpersonal Accord and Conformity

  • "Good boy/good girl" orientation—being moral means earning approval from people you care about
  • Peer influence peaks here—adolescents at this stage make decisions based on what friends will think
  • Intentions now matter—a person who meant well is judged less harshly than someone with bad intentions

Stage 4: Authority and Social-Order Maintaining Orientation

  • Laws exist for good reason—morality means respecting authority and maintaining societal stability
  • Duty and obligation drive behavior"It's the law" is sufficient justification for moral action
  • Broadened perspective—the focus shifts from immediate relationships to society as a whole

Compare: Stage 3 vs. Stage 4—both prioritize conformity, but Stage 3 is about personal relationships ("What will my friends think?") while Stage 4 is about abstract systems ("What does society require?"). Most adults operate primarily at Stage 4.


Post-Conventional Stages: Principles Transcend Rules

Post-conventional reasoning requires formal operational thinking and the ability to evaluate laws against abstract ethical standards. Very few people consistently reason at this level.

Stage 5: Social Contract Orientation

  • Laws are agreements, not absolutes—rules should serve the majority while protecting individual rights
  • Democratic reasoning emerges—unjust laws can be changed through legitimate processes
  • Balances individual and collective welfare—considers both personal liberty and the greater good

Stage 6: Universal Ethical Principles

  • Conscience guides action—individuals follow self-chosen ethical principles even when they conflict with law
  • Justice, equality, and human dignity are the ultimate standards for moral judgment
  • Civil disobedience becomes justifiable—Kohlberg cited figures like Martin Luther King Jr. as examples

Compare: Stage 5 vs. Stage 6—both question laws, but Stage 5 works within the system (change unjust laws democratically) while Stage 6 may act outside it (break unjust laws based on higher principles). Stage 6 is theoretical—Kohlberg later questioned whether anyone consistently operates here.


Factors Influencing Moral Development

Kohlberg's stage progression isn't automatic—it depends on cognitive growth, social experience, and environmental factors. Understanding these influences helps you answer questions about individual differences.

  • Stages unfold sequentially—you can't skip stages, and regression is rare but possible under stress
  • Cognitive development is necessary but not sufficient—formal operations enable post-conventional thinking but don't guarantee it
  • Most adults plateau at Stage 4—higher stages require deliberate exposure to moral complexity

Relationship to Piaget's Cognitive Development

  • Kohlberg built directly on Piaget's foundation—both saw development as stage-based and driven by cognitive maturation
  • Moral reasoning requires cognitive readiness—you can't reason abstractly about ethics without abstract thinking ability
  • Key difference: Kohlberg focused specifically on moral judgment while Piaget addressed broader cognitive structures

Compare: Piaget vs. Kohlberg—Piaget identified two stages of moral reasoning (heteronomous and autonomous), while Kohlberg expanded this into six stages. Both agree that moral development parallels cognitive development, but Kohlberg provides more nuanced distinctions.


Criticisms and Limitations

The AP exam frequently tests your ability to evaluate psychological theories critically. Knowing these critiques is just as important as knowing the stages themselves.

Gender Bias: Gilligan's Critique

  • Carol Gilligan argued the theory favors male moral reasoning—Kohlberg's original sample was entirely male
  • Justice vs. care ethics—Gilligan proposed that women often prioritize relationships and care over abstract justice
  • The "different voice" perspective—suggests women aren't less developed, just differently oriented toward moral questions

Cross-Cultural Limitations

  • Western individualism embedded in higher stages—prioritizing individual rights over community may reflect cultural bias
  • Collectivist cultures may value different principles—harmony, duty to family, and group welfare might not fit the stage hierarchy
  • Universal claims require universal evidence—Kohlberg's research was primarily conducted in Western contexts

Methodological Concerns

  • Moral dilemmas were hypothetical—responses to abstract scenarios may not predict real-world moral behavior
  • Verbal ability confounds results—articulate people may score higher regardless of actual moral reasoning
  • Longitudinal studies showed inconsistency—people don't always respond at the same stage across different dilemmas

Compare: Kohlberg vs. Gilligan—both study moral development, but Kohlberg emphasizes justice and rights while Gilligan emphasizes care and relationships. An FRQ asking about gender differences in moral reasoning is looking for this contrast.


Quick Reference Table

ConceptBest Examples
Pre-conventional reasoningStage 1 (punishment avoidance), Stage 2 (self-interest)
Conventional reasoningStage 3 (peer approval), Stage 4 (law and order)
Post-conventional reasoningStage 5 (social contract), Stage 6 (universal principles)
External motivationStages 1-2 (consequences determine morality)
Social motivationStages 3-4 (relationships and rules determine morality)
Internal motivationStages 5-6 (principles determine morality)
Gender bias critiqueGilligan's care ethics, male-only original sample
Cultural bias critiqueWestern individualism, collectivist alternatives

Self-Check Questions

  1. A teenager refuses to cheat on a test because "my parents would be so disappointed in me." Which stage of moral reasoning does this reflect, and why?

  2. Compare Stage 1 and Stage 6 reasoning about the same action (breaking a law). How would the motivation differ even if the behavior looks identical?

  3. Why did Carol Gilligan criticize Kohlberg's theory, and what alternative framework did she propose? How might this appear on an FRQ about gender and development?

  4. A person argues that civil disobedience is justified when laws violate human dignity. Which stage does this represent, and how does it differ from Stage 4 reasoning?

  5. Explain why someone with formal operational thinking (Piaget) might still remain at the conventional level of moral reasoning (Kohlberg). What additional factors influence progression to post-conventional stages?