Development

What you'll learn

• How the brain develops before and after birth, and what that implies for the early years
• Piaget's theory: schemas, assimilation, accommodation and the four stages
• Conservation and egocentrism, and the studies Piaget built on them
• Why later researchers concluded Piaget underestimated young children
• Vygotsky's alternative: the zone of proximal development and scaffolding
• Dweck's mindset theory, and why praising ability can backfire
• Willingham's argument against learning styles, and what he says matters instead

Key terms and definitions

Development — the changes in thinking and behaviour that occur as a person grows.

Nature — the influence of inherited, biological factors.

Nurture — the influence of environment and experience.

Cognitive development — the development of thinking, reasoning and understanding.

Schema — a mental framework of ideas about the world.

Assimilation — fitting new information into an existing schema.

Accommodation — changing an existing schema, or forming a new one, because information does not fit.

Disequilibrium — the state of cognitive imbalance when new information conflicts with an existing schema.

Object permanence — understanding that an object continues to exist when it cannot be seen.

Conservation — understanding that quantity stays the same despite a change in appearance.

Egocentrism — being unable to see a situation from any viewpoint other than one's own.

Zone of proximal development (ZPD) — the gap between what a learner can do alone and what they can do with help.

Scaffolding — the support given by a more knowledgeable other, withdrawn as competence grows.

Fixed mindset — the belief that ability is an unchangeable quality a person either has or lacks.

Growth mindset — the belief that ability can be developed through effort, strategy and persistence.

Learning style — the claim that each learner has a preferred way of receiving information and learns better when taught that way.

Core concepts

Early brain development

The brain develops both before and after birth. Neurons form connections, and those connections are strengthened or lost depending on experience — a process shaped by nature (genes and biological maturation) and nurture (environment and experience) together.

The practical implication is significant. If the brain develops rapidly in the first years and is shaped by the stimulation and care it receives, then nutrition, interaction and a secure environment in that period have effects that later provision cannot fully undo. That is the case for investing in early years rather than waiting for school.

The risk in that argument, worth stating in evaluation, is treating the period as a deadline after which nothing can change. Development continues well into adolescence, and the brain retains considerable capacity to change.

Piaget's theory

Piaget proposed that children are active learners who construct their own understanding, rather than passive recipients of instruction. Three processes drive this.

A schema is a mental framework of knowledge. Assimilation fits new information into a schema that already exists. Accommodation changes the schema, or creates a new one, because the information will not fit. The trigger for accommodation is disequilibrium — the discomfort of a mismatch between what the child believes and what they have encountered.

A child who knows "dog" and calls every four-legged animal a dog is assimilating. Corrected, and forming a separate schema for cats, they have accommodated. The mismatch that prompted the change was disequilibrium.

Piaget argued children pass through four stages in a fixed order:

• Sensorimotor (0–2) — learning through senses and movement; object permanence develops
• Pre-operational (2–7) — language and symbols used, but thinking is egocentric and lacks conservation
• Concrete operational (7–11) — logical thinking about concrete objects; conservation achieved
• Formal operational (11+) — abstract and hypothetical reasoning develops

Conservation and egocentrism

Conservation is understanding that a quantity stays the same despite a change in appearance. Piaget's task poured water from a short wide glass into a tall thin one; pre-operational children commonly said there was now more water. They were attending to the height of the liquid and ignoring the compensating change in width.

Egocentrism is inability to take another viewpoint. In Piaget's three mountains task, children were shown a model landscape and asked what a doll positioned opposite would see. Pre-operational children described the scene as they saw it. Piaget concluded they could not decentre from their own perspective.

Note carefully that egocentrism in this sense is a cognitive limitation, not selfishness. Answers that treat it as a character flaw lose marks.

Evaluating Piaget

Strengths. The theory rests on careful, detailed observation. It established that children think differently from adults rather than simply knowing less — a genuinely new idea. And it transformed education.

Criticisms. The most important is that Piaget appears to have underestimated children. When tasks were made more familiar and the purpose of the question clearer, children showed conservation and perspective-taking earlier than his stages predicted. This suggests his tasks were partly measuring how well children understood an unusual request rather than what they could actually do.

Development may also be more continuous than discrete stages imply, with abilities appearing gradually rather than switching on. And because his early work drew on a small sample, including his own children, generalisation is limited.

Applied to teaching, tying activities to fixed stages can set expectations too low and hold back children who are ready for more.

Vygotsky: learning with others

Vygotsky agreed development was active but located it socially rather than individually. Understanding arises first between people and only then becomes internal.

The zone of proximal development is the gap between what a learner can do alone and what they can achieve with guidance. Teaching should target that zone: tasks the child cannot yet manage independently but can complete with help. Work inside what the child already does teaches nothing new; work far beyond the zone produces only failure.

Scaffolding is the support a more knowledgeable other provides — modelling, prompting, breaking a task down. Crucially it must be withdrawn as competence grows. The aim is independent performance, so support that continues after it is needed prevents the learner taking over the task themselves. Fading the scaffold is as much part of the method as providing it.

Vygotsky also argued that language and thought begin as separate processes and become intertwined, with language eventually serving as a tool for thinking rather than only for communicating.

The contrast with Piaget is the most examined comparison in this topic. For Piaget, readiness sets the limit — instruction must wait for the child's stage. For Vygotsky, instruction can lead development. That difference produces genuinely different classrooms: discovery learning on one account, guided interaction on the other.

Evaluating Vygotsky: the theory explains why teaching and collaboration accelerate learning, which a purely individual account cannot, and accounts for cultural differences in what children learn and when. Against it, the zone of proximal development is difficult to measure precisely, the theory says less than Piaget's about the internal mechanism of change, and it may understate what children work out alone.

Dweck: mindset

Dweck's theory concerns beliefs about ability rather than stages of thinking.

A learner with a fixed mindset believes ability is an unchangeable quality you either have or lack. Difficulty then threatens their self-image, so they avoid challenges that risk exposing a deficiency, and they give up when work gets hard.

A learner with a growth mindset believes ability develops through effort, strategy and persistence. Difficulty is read as part of learning rather than as evidence of failure.

The practical claim concerns praise. Praising a child for natural ability implies the quality is fixed, so a later failure threatens their whole sense of themselves. Praising effort and strategy encourages a growth mindset. A student told repeatedly that they are naturally gifted may quit quickly when work becomes hard, because quitting protects the identity that praise created.

Evaluating Dweck: the theory identifies a belief that is measurable and changeable, offers teachers a specific intervention, and fits the observation that learners respond very differently to the same difficulty. But effect sizes in later replications have often been smaller than the original claims, mindset is assessed by self-report, and the theory can be misapplied as telling struggling students that effort alone is enough — when teaching quality and resources also matter.

Willingham: knowledge, not styles

Willingham's contribution is largely critical, and it is worth stating his actual argument rather than gesturing at it.

On learning styles — the claim that each learner has a preferred mode, visual or auditory, and learns better when taught in it — his position is that learners may well report a preference, but studies repeatedly find no attainment gain from matching teaching to it. Since that is the test the claim itself proposes, the claim fails. Effort spent identifying styles is diverted from approaches that do work.

What he argues matters instead is meaning and background knowledge. Thinking skills are closely tied to what a learner already knows, because knowledge is what new material attaches to. Practice until component skills become automatic frees attention for harder thinking.

Evaluating Willingham: his position rests on repeated failures to find the predicted effect, which is strong ground, and it redirects teachers towards what evidence supports. The counter-argument is that preferences are real and may affect motivation and engagement even if they do not affect how information is stored — and his account gives less guidance on the individual differences teachers still observe.

Worked examples

Example 1: Assimilation and accommodation

A child who knows the schema "dog" sees a cat and calls it a dog. Later they learn it is different and form a new schema. Identify the processes involved. (3 marks)

Calling the cat a dog is assimilation, because the child is fitting the new animal into an existing schema (1). Forming a separate schema for cats, because the animal does not fit the dog schema, is accommodation (1). The mismatch that prompted the change is disequilibrium (1).

Example 2: Conservation

A child sees water poured from a short wide glass into a tall thin glass and says there is now more water. What does this show? (3 marks)

The child lacks conservation (1) — they do not understand that the quantity of water stays the same despite the change in appearance (1). Piaget placed this in the pre-operational stage, and explained it as the child attending only to the height of the liquid while ignoring the change in width (1).

Example 3: Applying the zone of proximal development

A teacher wants to use Vygotsky's ideas when introducing long division. Explain how. (4 marks)

The teacher should set work within the zone of proximal development — beyond what pupils can do alone but achievable with guidance (1). They would scaffold the task by modelling each step and prompting pupils through it (1). As pupils become more competent the support should be gradually withdrawn (1), so that they end up performing the procedure independently, which is the aim of scaffolding (1).

Example 4: Comparing Piaget and Vygotsky

Explain one difference between Piaget's and Vygotsky's views on the role of other people in learning. (3 marks)

Piaget saw the child as constructing understanding largely alone, through interaction with the physical world, with readiness setting a limit on what can be learned (1). Vygotsky saw understanding as arising first between people and only then becoming internal (1). For Vygotsky, therefore, instruction can lead development rather than having to wait for it (1).

Example 5: Applying Dweck

Ravi has always been praised for being naturally clever. He gives up quickly on difficult work. Explain this using Dweck's theory. (3 marks)

Praise for natural ability has encouraged a fixed mindset, in which Ravi believes ability is unchangeable (1). Difficulty is therefore interpreted as evidence that he lacks the ability after all (1). Giving up protects that self-image, whereas praise for effort and strategy would have encouraged a growth mindset in which difficulty is part of learning (1).

Common mistakes and how to avoid them

Confusing assimilation and accommodation. Assimilation fits information into an existing schema; accommodation changes the schema. One preserves, the other alters.

Getting the stages out of order or muddling their features. Learn them in sequence with one feature each: sensorimotor (object permanence), pre-operational (egocentrism, no conservation), concrete operational (conservation), formal operational (abstract reasoning).

Treating egocentrism as selfishness. It is an inability to take another perspective, not a moral failing.

Being vague about conservation. It is understanding that the quantity stays the same despite a change in appearance. Both halves are needed.

Giving Piaget with no evaluation. Most questions above three marks want the criticism that he underestimated children's abilities.

Blurring Piaget and Vygotsky. Piaget: the individual child discovers, readiness limits learning. Vygotsky: understanding is social first, instruction can lead development.

Saying scaffolding is simply "helping". The withdrawal of support is essential to the concept.

Saying Dweck proved mindset determines achievement. Later replications found smaller effects, and teaching quality matters too.

Claiming Willingham denied that preferences exist. He accepted they exist while denying they affect learning outcomes.

Exam technique for Development

Learn the stages as a sequence with one feature each. Ordering questions appear in this topic, and a single feature per stage is enough to answer most description questions.

Name the theorist. Piaget, Vygotsky, Dweck, Willingham. A generic answer about "some psychologists" earns far less than one that attributes the claim.

For comparison questions, state both positions then the consequence. The marks come from what the difference means for teaching, not merely from stating that the two disagree.

Use the underestimation criticism precisely. The point is that unfamiliar or confusingly worded tasks understated what children could do — not simply that "Piaget was wrong".

Apply theories to education explicitly. Piaget supports active, hands-on discovery matched to stage. Vygotsky supports guided interaction and scaffolding. Dweck supports how praise is worded. Willingham supports building knowledge and automaticity over styles.

Watch for research methods questions. Piaget's early work used a small sample including his own children; Dweck's mindset is measured by self-report. Both are reliable evaluation points.

Take a position in extended answers. Where a question pits two theories against each other, the strongest answers say which conditions each explains best rather than declaring one correct.

Quick revision summary

• Brain development is shaped by nature and nurture together; early experience matters but is not a deadline
• Piaget: children actively build schemas via assimilation, accommodation and disequilibrium
• Four stages: sensorimotor (object permanence), pre-operational (egocentric, no conservation), concrete operational (conservation), formal operational (abstract reasoning)
• Conservation = quantity unchanged despite appearance; egocentrism = cannot take another viewpoint
• Three mountains task was Piaget's evidence for egocentrism
• Main criticism: Piaget underestimated children — familiar, clearer tasks show earlier ability
• Development may be continuous rather than staged; early samples were small
• Vygotsky: understanding is social first; teach within the zone of proximal development
• Scaffolding must be withdrawn as competence grows — the withdrawal is the point
• Piaget vs Vygotsky: readiness limits learning, or instruction leads it
• Dweck: fixed mindset treats ability as unchangeable; growth mindset treats it as developable
• Praise effort and strategy, not natural ability — praising ability makes difficulty threatening
• Willingham: no attainment gain from matching teaching to learning styles; meaning and background knowledge are what matter
• Each theory maps onto a distinct classroom practice — say which when applying them