Piaget, Kohlberg and Vygotsky — The Three Theorists CTET Asks About
Syllabus topic: Child Development (15): concept of development & learning, principles of development, heredity & environment, socialization, Piaget / Kohlberg / Vygotsky, child-centred & progressive education, intelligence, language & thought, gender, individual differences, assessment for/of learning, CCE
Three names return in CTET's Child Development section in almost every cycle. Questions rarely ask for definitions alone — they describe a classroom situation and ask which theory explains it. This note organises each theory around what a teacher actually observes.
Piaget: the child constructs knowledge in stages
Piaget held that children build understanding actively through schemas — mental frameworks that grow by assimilation (fitting new experience into an existing schema) and accommodation (changing the schema when experience does not fit). He described four stages: Sensorimotor (0–2 years, object permanence develops), Pre-operational (2–7, language blooms but thinking is egocentric and conservation is absent), Concrete Operational (7–11, conservation and logical thinking about concrete objects), and Formal Operational (11+, abstract and hypothetical reasoning).
The classic CTET situation: a child who insists that water poured into a wider glass has “become less” is showing absence of conservation — pre-operational stage. Keywords that point to Piaget: stages, schema, assimilation, accommodation, conservation, egocentrism.
Kohlberg: moral reasoning develops in levels
Kohlberg studied how children's REASONING about right and wrong changes, using moral dilemmas (the famous Heinz dilemma). His three levels: Pre-conventional (behaviour driven by punishment avoidance and personal gain), Conventional (driven by social approval and law-and-order), and Post-conventional (driven by social contract and universal ethical principles).
In a question, look at WHY the child acts, not what the child does. “Ravi returns the money because the teacher would punish him” is pre-conventional; “…because rules must be followed” is conventional; “…because honesty matters even if no one knows” is post-conventional reasoning.
Vygotsky: learning is social first
Vygotsky argued that learning happens first between people (social interaction, language, culture) and only then inside the child. His two classroom ideas are the Zone of Proximal Development (ZPD) — the gap between what a child can do alone and what the child can do with guidance — and scaffolding, the temporary support a teacher or peer provides inside that zone.
Keywords that point to Vygotsky: social interaction, language as a tool of thought, ZPD, scaffolding, more knowledgeable other, cultural tools. Where Piaget emphasises the child discovering alone, Vygotsky emphasises the child learning WITH others — CTET loves this contrast.
- Piaget → stages, schema, assimilation/accommodation, conservation
- Kohlberg → moral dilemmas; judge the reason, not the action
- Vygotsky → ZPD, scaffolding, language, social learning
Key points to remember
- Piaget: development unfolds in four fixed stages; the child constructs knowledge actively.
- Kohlberg: moral reasoning moves from punishment/reward to social rules to principles.
- Vygotsky: learning is social; teach inside the Zone of Proximal Development with scaffolding.
- In situational questions, match the keyword and the underlying reason, not surface details.
Topic from the official CTET syllabus (Child Development and Pedagogy) as published in NaukriHelp's CTET exam guide. Note written by NaukriHelp; NCERT's child-development material used as subject reference only.