In this article
- Who was Jean Piaget?
- The four stages of cognitive development
- The concepts that matter for adult learning
- Does cognitive development stop in adolescence?
- How to apply Piaget's theory to workplace training
- Start from what people already know
- Create productive disequilibrium
- Let people act before you explain
- Make abstract ideas concrete first
- Leave time for accommodation
- Piaget and other learning theories
- Piaget in practice: learning by doing
- Frequently asked questions
Think about the last time a new system arrived at work. For the first few days you probably used it exactly like the old one, clicking where you used to click and expecting the same results. Then something didn't work the way you expected, and you had to change how you thought about the tool, not just which buttons you pressed.
Jean Piaget had names for both of those moments. He called the first assimilation and the second accommodation, and he spent most of his career showing that learning happens in the movement between them. He studied children, not employees. Yet his theory of cognitive development remains one of the most useful lenses for anyone who designs training for adults.
Who was Jean Piaget?
Jean Piaget (1896–1980) was a Swiss psychologist who set out to understand how knowledge develops in the human mind. Rather than testing what children knew, he paid attention to the mistakes they made, convinced that those errors revealed how they were thinking.
His central conclusion changed education: people don't absorb knowledge passively. They build it, by acting on the world and adjusting their understanding when reality doesn't match what they expected. That idea is the foundation of constructivism, the family of learning theories that also includes the work of Lev Vygotsky.
The four stages of cognitive development
Piaget described four stages that every child passes through in the same order, although not always at the same age.
Stage | Typical age | What changes | Example |
|---|---|---|---|
Sensorimotor | Birth to 2 years | The child learns through the senses and movement, and discovers that objects still exist when out of sight | A baby looks for a toy hidden under a blanket |
Preoperational | 2 to 7 years | Language and symbolic play appear, but thinking is self-centred and not yet logical | A child believes a tall, thin glass holds more water than a short, wide one |
Concrete operational | 7 to 11 years | Logical thinking emerges, as long as it is tied to concrete objects and situations | A child understands the water is the same amount, whatever the glass |
Formal operational | From 12 years | Abstract and hypothetical reasoning becomes possible: testing ideas, thinking about possibilities | A teenager reasons through "what would happen if…" without needing to see it |
For corporate training, the first three stages are mainly background. The fourth matters most, because it describes the kind of thinking most professional roles demand: weighing options, testing hypotheses and applying principles to situations no one has seen before.
The concepts that matter for adult learning
The stages get the most attention, but the mechanisms behind them are what make Piaget relevant at work.
- Schemas. Mental frameworks that organise what we know about something. An experienced salesperson has a schema for "a difficult negotiation" that a new hire doesn't have yet.
- Assimilation. Fitting new information into an existing schema. A manager who has run in-person meetings for years tries to run remote ones the same way.
- Accommodation. Changing the schema itself because the new information doesn't fit. The same manager realises that silence on a video call doesn't mean agreement, and changes how they check for understanding.
- Equilibration. The drive to restore balance when what we know and what we experience don't match. That uncomfortable mismatch, which Piaget called disequilibrium, is what pushes people to learn.
The practical lesson is clear. Training that only adds information supports assimilation. Training that creates a moment where existing habits stop working forces accommodation, and that is where behaviour actually changes.
Does cognitive development stop in adolescence?
Piaget placed the last stage at around 12 years old, which can make his theory sound irrelevant to adults. Later research has qualified that picture in two ways.
First, reaching the formal operational stage is neither automatic nor universal. Adults often reason abstractly in areas they know well and fall back on concrete thinking in unfamiliar ones. A finance director can build a complex model and still struggle with an abstract argument about team dynamics.
Second, some researchers have proposed a further, post-formal stage of adult thinking, one that accepts contradiction, context and the idea that problems can have more than one valid answer. That is closer to the judgement leaders need than pure logic.
For training design, the conclusion is useful: don't assume that because people are adults, they will handle abstract content in a new field. Start concrete, then build up.
How to apply Piaget's theory to workplace training
Start from what people already know
Every new idea is assimilated into an existing schema, so find out what that schema is before you teach. A short diagnostic, a question at the start of a session or a quick exercise reveals which assumptions you will be building on and which you will have to challenge.
Create productive disequilibrium
People change their mental models when the old ones visibly fail. Present a case where the usual approach doesn't work: a customer who doesn't respond to the standard script, a project where the obvious decision backfires. The discomfort is the point, as long as it happens in a safe setting.
Let people act before you explain
Piaget's children learned by doing, and adults are no different. Let participants try, make decisions and see the consequences before you introduce the theory. Explanation lands better when it answers a question the learner already has.
Make abstract ideas concrete first
In an unfamiliar field, even capable adults think more concretely. Introduce a new framework through a specific situation, then generalise. A principle of negotiation is easier to grasp after you have watched it decide the outcome of one negotiation.
Leave time for accommodation
Changing a schema takes reflection, not just repetition. Build in moments to ask what was different from what participants expected and what they would do differently next time. This is the same step that closes Kolb's experiential learning cycle.
Piaget and other learning theories
Piaget is one voice in a longer conversation about how people learn. Placing him next to the others helps you choose which ideas to use, and when.
Theorist | Where learning happens | What it means for training |
|---|---|---|
Jean Piaget | In the individual, through action and adjustment | Design experiences that challenge existing assumptions |
Lev Vygotsky | In interaction with more experienced people | Pair learners with mentors and pitch tasks just beyond their current level |
Albert Bandura | Through observing others | Show the behaviour, then let people practise it (social learning theory) |
David Kolb | In a cycle of experience and reflection | Alternate doing and reflecting, never just one of them |
George Siemens | In networks of people and tools | Teach people how to find and connect knowledge (connectivism) |
The main difference with Vygotsky is emphasis. Piaget saw development leading learning, with each person building knowledge largely on their own. Vygotsky saw social interaction leading development. In practice, the best programmes use both.
Piaget in practice: learning by doing
Piaget's work points to a simple standard for any training programme: does it ask people to act, to be surprised and to adjust? Lectures and slide decks mostly feed assimilation. Simulations, case work and practical learning strategies create the moments of disequilibrium that lead to accommodation.
That is why training simulations work so well with adults. In a simulator, participants make real decisions, see the consequences and try again, which is the cycle Piaget described, compressed into a session. Our catalogue includes more than 70 video games built on this principle, available in up to 20 languages.
Book your demo to see how they work in practice.
Frequently asked questions
What are Piaget's four stages of cognitive development?
Sensorimotor (birth to 2 years), preoperational (2 to 7), concrete operational (7 to 11) and formal operational (from about 12). Each stage brings a new way of thinking, from learning through the senses to reasoning about abstract and hypothetical ideas.
What is the difference between assimilation and accommodation?
Assimilation is fitting new information into what you already know. Accommodation is changing what you know because the new information doesn't fit. Both are part of learning, but accommodation is where a real change in understanding happens.
Is Piaget's theory relevant to adults?
Yes, though not because of the stages. His ideas about schemas, assimilation, accommodation and the role of disequilibrium apply to learners of any age, and they explain why active, experience-based training changes behaviour more than passive instruction.
What are the main criticisms of Piaget's theory?
Later research found that children often reach some abilities earlier than Piaget thought, that development is less rigidly divided into stages and that culture and context play a bigger role than he allowed. Many adults also reason abstractly only in areas they know well.
How is Piaget different from Vygotsky?
Piaget saw learning mainly as an individual process, driven by a person's own actions and discoveries. Vygotsky placed social interaction at the centre, arguing that people learn most when someone more experienced guides them just beyond what they can do alone.
