How does Piaget explain the stages of cognitive development?
Piaget's stages of cognitive development: sensorimotor, pre-operational, concrete operational and formal operational, plus key concepts such as schemas, conservation and egocentrism.
A focused answer to AQA GCSE Psychology 3.3, covering Piaget's four stages of cognitive development (sensorimotor, pre-operational, concrete operational and formal operational) and key concepts including schemas, conservation, egocentrism and object permanence.
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What this dot point is asking
AQA wants you to describe Piaget's four stages of cognitive development with their approximate ages, explain key concepts such as schemas, conservation, egocentrism and object permanence, and evaluate the theory. This is a heavily examined topic in Paper 1, so you need both the precise sequence and the evidence for and against it.
Key concepts
- Object permanence: knowing an object still exists when it is out of sight. It develops in the sensorimotor stage; before it, a hidden toy is "gone" to the infant.
- Conservation: understanding that the amount of something stays the same even if its appearance changes (such as the same water poured into a taller, thinner glass). It develops in the concrete operational stage. Piaget's classic task showed pre-operational children wrongly judge the taller glass to hold more.
- Egocentrism: seeing the world only from your own viewpoint and being unable to take another person's perspective. Piaget tested this with the "three mountains" task, where young children could not pick out the view another person would see.
The four stages
Evaluating Piaget
Piaget's theory was very influential in education and is supported by his conservation and egocentrism tasks. However, later research suggests he underestimated children's abilities, partly because his tasks were confusing for young children. When tasks are simplified (for example, hiding a "naughty teddy" who moves the counters, in the conservation task), children show conservation earlier than Piaget claimed. Critics also argue development may be more gradual than a sequence of discrete stages suggests.
Try this
Q1. Name Piaget's four stages of cognitive development in order. [4 marks]
- Cue. Sensorimotor, pre-operational, concrete operational, formal operational.
Q2. Explain what is meant by egocentrism. [2 marks]
- Cue. Seeing the world only from your own viewpoint, unable to take another person's perspective.
Q3. Identify the process by which an existing schema is changed to fit a new experience. [1 mark]
- Cue. Accommodation.
Exam-style practice questions
Practice questions written in the style of AQA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
AQA 20184 marksDescribe Piaget's four stages of cognitive development. (Paper 1, Section C)Show worked answer →
A 4-mark Describe item rewards each stage named in order with its approximate age and a defining feature (roughly one mark per stage).
Sensorimotor (0 to 2 years): the child learns through senses and movement and develops object permanence. Pre-operational (2 to 7): the child uses language and symbols but is egocentric and cannot conserve. Concrete operational (7 to 11): the child can conserve and reason logically about real, concrete objects. Formal operational (11 and over): the child can think abstractly and reason about hypothetical problems.
Markers reward the correct order, approximate ages and a key feature for each. They penalise muddling the order or attaching the wrong feature to a stage.
AQA 20214 marksEvaluate Piaget's theory of cognitive development. (Paper 1, Section C)Show worked answer →
A 4-mark Evaluate item rewards strengths and limitations with a brief judgement.
Strengths: the theory was hugely influential in education (discovery learning, stage-appropriate teaching), and Piaget's conservation and egocentrism tasks gave clear, replicable demonstrations of how children's thinking differs from adults'. Limitations: later research (for example, simplified or less confusing versions of his tasks) suggests Piaget underestimated children's abilities, finding conservation and perspective-taking earlier than he claimed; development may also be more gradual than fixed, discrete stages imply.
Markers reward at least one developed strength and one developed limitation plus a judgement (for example, that the theory is valuable but the ages and rigidity of the stages are questionable).
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A focused answer to AQA GCSE Psychology 3.3, explaining the nature-nurture debate, the influence of genes (nature) and the environment (nurture) on development, and how the two interact to shape behaviour and abilities.
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Sources & how we know this
- AQA GCSE Psychology (8182) specification — AQA (2017)