Human Development · Paper A
Kohlberg moral development
Kohlberg assessed moral development by presenting hypothetical dilemmas and analysing the reasoning given, not the final answer chosen. For example, imagine two people who both refuse to steal medicine to save a dying relative: one reasons it's simply against the law, the other reasons through a personal ethical principle about life versus property. In practice, those two reasonings place the same refusal at completely different Kohlberg stages.
Kohlberg proposed three levels of moral reasoning, each with two stages, assessed through dilemmas such as the Heinz dilemma, where a man must decide whether to steal an unaffordable drug to save his wife. Preconventional reasoning, typical in childhood, includes obedience and punishment-avoidance (stage 1) and instrumental self-interest (stage 2). Conventional reasoning includes interpersonal approval, the 'good boy, nice girl' stage (stage 3), and law-and-order, maintaining social rules (stage 4). Postconventional reasoning, reached by only a minority, includes social contract and individual rights (stage 5) and universal ethical principles that can justify breaking an unjust law (stage 6). Picture someone who breaks an unjust law based on a reasoned personal ethical principle, accepting the legal consequences. In practice, that reasoning, not the law-breaking itself, places them at Kohlberg's highest stage.
A fresh doctor might wonder why an exam in psychiatry covers a stage theory built by a psychologist studying moral reasoning rather than mental illness. Lawrence Kohlberg's theory matters because it gives a structured way to think about HOW a person reasons about right and wrong, which underlies real clinical judgements about , culpability, and a young person's developmental stage. Hold the phrase REASONING, NOT JUST BEHAVIOUR through every section below, because Kohlberg's theory is explicitly about the JUSTIFICATION a person gives for a moral choice, not the choice itself.
Kohlberg's theory proposes that moral reasoning develops through a fixed sequence of three broad LEVELS, each containing two STAGES, moving from reasoning based on external consequences, through reasoning based on social rules and approval, to reasoning based on internalised, self-chosen ethical principles. The theory was built largely by presenting people with moral DILEMMAS (scenarios with no clean right answer, forcing a justification to be given) and analysing the structure of their reasoning, not simply whether they chose one option or another.
A common mistake is assuming Kohlberg's stages map directly onto specific ages, or that reaching a higher stage means behaving more morally in practice. The theory describes the STRUCTURE of moral reasoning offered as justification, and a person can reason at a high stage yet still act badly, or reason at a lower stage yet behave well — the stages are about how a judgement is justified, not a guarantee of the judgement's content or of actual conduct.
Kohlberg's best-known tool is the Heinz dilemma: a man cannot afford a drug that could save his dying wife, and the question asks whether he should steal it. For example, a person might answer "yes, because he would be jailed if he let her die and other people would judge him" (an external, consequence-focused justification) or "yes, because life is worth more than property, and that principle holds regardless of the law" (an internalised, principled justification) — Kohlberg scored the STRUCTURE of the reasoning behind the answer, not whether the respondent said yes or no.
Pre-conventional morality is typical of young children and is organised around the self, with reasoning judged by direct consequences rather than social rules. Stage 1 (obedience and punishment orientation) reasons purely in terms of avoiding punishment — an act is wrong because it leads to being punished. Stage 2 (instrumental and exchange orientation) reasons in terms of self-interest and reciprocal exchange — an act is right if it serves one's own needs or involves a fair trade ("you scratch my back, I'll scratch yours").
Conventional morality, typical from later childhood through most of adolescence and adulthood, shifts reasoning toward maintaining social approval and social order. Stage 3 (good interpersonal relationships orientation) judges an act by whether it maintains the approval and trust of others close to the person — being "good" means living up to others' expectations. Stage 4 (maintaining social order orientation) judges an act by whether it upholds laws, rules, and duty to the wider social system, reasoning that society depends on rules being followed even when a specific rule feels unfair in an individual case.
Post-conventional morality, which Kohlberg argued many adults never fully reach, reasons from self-chosen, internalised ethical principles that can, in principle, stand apart from existing laws. Stage 5 (social contract orientation) recognises that laws are a social contract for the greater good, but accepts that unjust laws can and should be changed through legitimate processes. Stage 6 (universal ethical principles orientation) reasons from abstract, self-chosen universal principles — such as justice, equality, and human dignity — that a person would follow even if they conflicted with existing law, and which Kohlberg described as a rare, largely theoretical endpoint.
Carol Gilligan, a former colleague of Kohlberg, argued his stages reflect a justice-and-rules-based ethic that may not fairly capture an alternative, equally valid "ethic of care" orientation focused on relationships and responsibility, and that his original research samples were not adequately representative. The theory has also been criticised as culturally biased toward Western, individualist notions of principled, rule-transcending reasoning as the highest form of morality, since not all cultures value that endpoint equally.
Kohlberg's stages are frequently confused with two other stage theories taught alongside them. Piaget's stages of cognitive development (sensorimotor, preoperational, concrete operational, formal operational) describe general THINKING across all domains, not moral reasoning specifically — Piaget's formal operational stage is a prerequisite that makes Kohlberg's post-conventional reasoning possible, but the two theories measure different things. Erikson's psychosocial stages describe a lifespan sequence of developmental CRISES (such as identity versus role confusion in adolescence), an entirely different axis from Kohlberg's structure-of-moral-justification model. Within Kohlberg's own scheme, Stage 3 (approval-seeking) and Stage 4 (rule-and-duty) are the pair most often confused with each other, since both involve conforming to external standards but differ in whether the standard is a specific relationship or the wider social system.
There is no clinical diagnosis here, since this is not a disorder — but Kohlberg's own methodology gives a genuine assessment process. A trained rater presents standardised moral dilemmas, such as the Heinz dilemma, in a structured Moral Judgment Interview, then scores the STRUCTURE of the person's reasoning against a detailed manual, rather than scoring which option they chose. This structured-interview approach is the model's real-world equivalent of an assessment tool.
Kohlberg's framework is not a treatment and nothing is "managed" with it in the clinical sense. Its practical use is as a reference framework: understanding typical developmental stages of moral reasoning is a useful, non-diagnostic reference point when assessing a young person's judgement or evaluating a case involving developmental maturity and culpability in forensic or safeguarding contexts, and in education about how moral reasoning matures over time. It is a thin, non-clinical topic without a directly matching NICE or diagnostic guideline, and no such guideline should be invented for it.
Exam questions often present a vignette illustrating a specific reasoning STYLE (for example, "he returned the wallet because he feared being caught," a Stage 1 example) and expect the candidate to identify the correct stage from the reasoning given, not from the action alone; a frequent trap swaps two similarly worded stages, such as confusing Stage 3's approval-seeking with Stage 4's rule-and-duty orientation, or confuses Kohlberg's moral stage with a Piagetian cognitive stage described in the same vignette.
Kohlberg proposed three levels of moral reasoning, each with two stages, scored by the STRUCTURE of a person's justification for a moral choice rather than the choice or behaviour itself — and it has been criticised by Gilligan and others for underweighting care-based reasoning and for cultural toward principled, rule-transcending judgement as the highest stage.