Cognitive Connie
Understanding moral development in toddlerhood
Toddlerhood (12–36 months) is the period in which proto-moral capacities become recognisably moral behaviour. The infant's preference for helpers and sensitivity to goal-directed action is now expressed in action: toddlers share, comfort distressed others, enforce rules, and show something that closely resembles indignation when norms are violated. This is not adult morality — it is partial, inconsistent, and heavily context-dependent — but it is far more than the asocial, egocentric behaviour that developmental textbooks described for much of the twentieth century.
Key figures
Carolyn Zahn-Waxler
b. 1944Pioneered longitudinal research on empathy and prosocial behaviour in toddlers, documenting the emergence of empathic concern, guilt, and altruistic helping across the second and third years. Her work established that children are not egocentric throughout toddlerhood but are responsive to others' distress from very early.
Michael Tomasello
b. 1950Proposed that shared intentionality — the capacity to engage in joint activities with shared goals and norms — is the uniquely human foundation of moral cognition. His comparative and developmental work traces the emergence of prosocial behaviour, norm understanding, and fairness across toddlerhood and early childhood.
Hannes Rakoczy
b. 1975Experimental work on norm understanding in young children, demonstrating that 2-year-olds distinguish game-rule violations from mere mistakes and protest third-party norm violations even without personal harm — evidence of genuinely normative, not merely preference-based, moral cognition.
Key concepts
Empathy-Related Responding
The capacity to perceive and share another person's emotional state, accompanied by a motivation to reduce their distress. Distinguishable from personal distress (self-focused) by its other-directed quality. Emerges in recognisable form between 12 and 18 months: toddlers comfort distressed others, offer comfort objects, and seek help on another's behalf. Closely associated with later prosocial behaviour and moral reasoning.
Norm Sensitivity
The awareness that actions can be correct or incorrect independent of their consequences for the observer. Demonstrated in toddlers by their protests at third-party norm violations — in peer interactions, game contexts, and object-use situations. Toddlers distinguish between actions that are merely unwanted (preference violations) and actions that are wrong (norm violations), responding with protest rather than simple avoidance.
Spontaneous Sharing
The voluntary distribution of resources to another in the absence of external pressure. Increases across toddlerhood and is modulated by relationship (more with familiar others), resource type, and context. By 24–30 months, toddlers begin to share spontaneously with unfamiliar recipients, though sharing declines when it requires sacrificing a valued resource from one's own supply.
Ownership Understanding
The grasp that objects belong to persons and that prior possession, creation, or designation confers ownership rights. Develops across the second and third years. Toddlers understand that taking another's property without permission is wrong, can track ownership across transformations (an owner's object remains theirs even after it is changed), and distinguish borrowing from taking.
Prosocial Behaviour
Actions that benefit others, including helping, sharing, comforting, and informing. Increases substantially across toddlerhood. Felix Warneken and Michael Tomasello distinguished instrumental helping (helping someone achieve a practical goal) from sharing (distributing resources) and found that instrumental helping develops earlier and is more robust. Prosocial behaviour is both biologically prepared and scaffolded by socialisation.
Test your knowledge
Sources
Last reviewed July 2025- 1.
Zahn-Waxler C. & Radke-Yarrow M. (1990). The origins of empathic concern. Motivation and Emotion, 14, 107–130.
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Foundational longitudinal study of empathy-related responding in toddlerhood.
- 2.
Rakoczy H., Warneken F., & Tomasello M. (2008). The sources of normativity: Young children's awareness of the normative structure of games. Developmental Psychology, 44, 875–881.
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Demonstrates norm sensitivity in 2–3-year-olds using game-rule violation paradigms.