From Baby to Teen: Piaget's Four Stages of Thinking, Explained

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From Baby to Teen: Piaget's Four Stages of Thinking

Educational Psychology · Chapter 4: Cognitive and Social Development in ChildrenSection 4.4 · lesson 31 of 1009 min · free with a free account

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In this lesson

Four qualitative transformations, and how to calibrate instruction to each.

  • Describe the four stages and their defining achievements
  • Explain egocentrism, centration and conservation
  • Match instructional design to a student's stage
  • State the main critique of Piagetian stage theory

Transcript

Everything said in the video, section by section (1,158 words). Read along, or search it.

Cognitive and Social Development in Children

From Baby to Teen: Piaget's Four Stages of Thinking

Ask a four-year-old whether a tall glass holds more water than a wide one. They will say yes, confidently, after watching you pour it. Ask the same child three years later and they will find the question silly. Nothing was taught in between. Something was reorganized. Sensorimotor. Preoperational. Concrete operational. Formal operational. For each one we will name the key achievement and the key limitation. And what it means for how you should teach at that age. We will finish with the strongest criticism of the theory. Which is that Piaget systematically underestimated what children can do.

The Structure

Universal, Invariant, Cumulative

Piaget proposed four stages of cognitive development. Each is characterized by a qualitatively different mode of thinking. First, the stages are universal. All children, regardless of culture, pass through the same sequence. Second, they are invariant. No stage can be skipped. Third, they are cumulative. Each stage builds on the achievements of the previous one. Earlier structures get incorporated into a more powerful organization. One qualification before we go further. The age ranges Piaget gave are approximate. Individual variation is considerable, and it always was.

Qualitative

Not More Knowledge. Different Thinking.

Each stage represents a qualitative transformation in thinking. Not merely a quantitative increase in knowledge. A concrete operational child does not simply know more. They think differently. The machinery changed. That distinction has a direct educational consequence. Instruction must be matched to more than what students know. It must be matched to how they are currently capable of thinking. Those are two separate questions. A student can have all the prerequisite knowledge for a task. And still be unable to perform the reasoning the task requires.

Stage One

Sensorimotor: Birth to About 2

The first stage is sensorimotor, from birth to about two. Infants and toddlers understand the world through senses and motor actions. Intelligence at this stage is practical and action-based. Shaking a rattle. Reaching for an object. Exploring textures with the mouth. All of those are forms of sensorimotor thinking. The stage's most significant achievement is object permanence. It typically develops around eight to twelve months. It is the understanding that objects continue to exist when out of sight. Before it, a hidden toy has not been hidden. It has stopped existing.

The Transition

Symbols Arrive

By the end of the sensorimotor period, something new appears. Children begin to develop representational thought. That is the ability to use symbols to stand for objects and events. Words, or mental images. It is the cognitive foundation for language acquisition. And it marks the transition into the next stage. Before, a thing that is gone is simply gone. After, a thing can be held in mind, named, and discussed in its absence. Almost everything a school does depends on that capacity. It is the precondition for teaching anything not physically present.

Stage Two

Preoperational: About 2 to 7

The second stage is preoperational, from about two to seven. It is characterized by rapid development of language and symbolic thought. And by several important cognitive limitations. The hallmark limitation is egocentrism. That is the inability to take the perspective of another person. Preoperational children assume others see and hear as they do. Piaget demonstrated this with the three mountains task. Children were shown a model of three mountains. A doll sat on the opposite side, with a different view. Asked what the doll could see, children typically described their own view. Not out of selfishness. The other viewpoint was not available to them.

Conservation

The Tall Glass Holds More

Preoperational children also lack conservation. That is the understanding that quantity stays the same despite appearance. Pour water from a short, wide container into a tall, thin one. Preoperational children judge the tall container to hold more. They focus on height, and ignore width. Two limitations underlie that failure, and both have names. Centration is focusing on one dimension while ignoring the others. Height captured attention, so width was not considered at all. Irreversibility is the inability to mentally undo an action. A child who could mentally pour the water back would see the answer. That mental operation is exactly what is not yet available.

Stage Three

Concrete Operational: About 7 to 11

Around age seven, children enter the concrete operational stage. They acquire the logical operations needed for solving concrete problems. Conservation is now mastered. Children understand that pouring water does not change its quantity. Classification, which is grouping objects by shared attributes. And seriation, which is ordering objects along a dimension. But there is a firm boundary on this stage. Concrete operational children apply logic only to real, tangible situations. Abstract or hypothetical reasoning remains beyond their reach. So a child at this stage can reason beautifully about actual blocks. And be stopped completely by the same logic written as a symbol.

Stage Four

Formal Operational: About 11 Onward

The fourth stage is formal operational, beginning around age eleven or twelve. It brings systematic abstract reasoning. Hypothetical-deductive thinking, and propositional logic. What would happen if, becomes a genuine question. Rather than a source of confusion, or a request for a real example. Adolescents can now reason about possibilities, not only actualities. Formal operational thinkers can also engage in metacognition. That is thinking about their own thinking. And they can plan multi-step strategies for problem-solving. Which is when studying, as a deliberate activity, becomes possible.

All Four

Achievement, Limitation, Implication

Set the four stages out with achievement, limitation and implication. Sensorimotor, birth to two. Achievement is object permanence and representational thought. Limitation is no language or symbolic reasoning at the start. So instruction means sensory-rich exploration, and naming objects. Preoperational, two to seven. Achievement is language, symbolic play and imagination. Limitation is egocentrism, no conservation, and centration. So use concrete materials and role-play, and avoid abstract rules. Concrete operational, seven to eleven. Achievement is conservation, classification and seriation. Limitation is that abstract and hypothetical reasoning are unavailable. So use hands-on activities and real-world problem solving. Formal operational, eleven and up. Abstract reasoning becomes available. The limitation is that it is not universal, and stress can regress thinking.

In Practice

Two Teachers, Two Calibrations

Here are two teachers, calibrating the same theory differently. A second-grade teacher avoids abstract rules for addition. She provides counting blocks, number lines, and grouping activities. Real objects, for concrete operational thinkers. Her colleague in eleventh grade does something else entirely. He assigns proof-writing in geometry. And what-if thought experiments in history. Both are applying stage theory to calibrate cognitive demand. Concrete operational children need hands-on, tangible materials. Formal operational students can handle abstraction and hypotheticals. Teaching abstract algebra to eight-year-olds is a mismatch. So is expecting six-year-olds to understand metaphor.

Critiques

Where the Theory Has Been Challenged

The theory has a serious criticism, and it should be taken seriously. Piaget's stage theory has been critiqued for underestimating children. Underestimating their actual competence, that is. Later research showed children demonstrate some abilities earlier. Earlier than Piaget suggested, under certain conditions. Specifically, when tasks are simplified, or made more meaningful. That criticism points at the method as much as the theory. A task a child fails may be testing the task's design. Rather than the limits of the child's thinking. Nevertheless, the core sequence remains valuable. It is a workable framework for grade-level cognitive expectations. Hold the sequence firmly, and the ages loosely.

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Educational Psychology carries a NCCRS credit recommendation. These universities work with NCCRS; some are UPI Study's signed partners. ACE and NCCRS have over 2,100 cooperating colleges that will consider accepting credits; the final decision is with the universities.

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FAQ

Questions students ask us

About From Baby to Teen: Piaget's Four Stages of Thinking

What are Piaget's four stages of cognitive development?
Piaget's four stages are sensorimotor (birth to about 2), preoperational (about 2 to 7), concrete operational (about 7 to 11), and formal operational (about 11 onward). Piaget described them as universal, invariant and cumulative: children pass through the same sequence, cannot skip a stage, and build each stage on the one before. Each stage is a qualitatively different way of thinking, and the age ranges are approximate.
What is object permanence and when does it develop?
Object permanence is the understanding that objects continue to exist when they are out of sight, and it is the most significant achievement of Piaget's sensorimotor stage. It typically develops around eight to twelve months of age. Before it appears, a hidden toy has effectively stopped existing for the infant. By the end of the sensorimotor period, children also begin representational thought, using words and mental images to stand for objects and events.
Why do preoperational children fail conservation tasks?
Preoperational children fail conservation tasks mainly because of centration and irreversibility. When water is poured from a short, wide glass into a tall, thin one, they focus on height and ignore width, so they judge the tall glass to hold more. They also cannot mentally undo the pouring. Children typically master conservation in the concrete operational stage, around age seven, along with classification and seriation.
What is the main criticism of Piaget's stage theory?
The main criticism is that Piaget underestimated children's actual competence. Later research showed children can demonstrate some abilities earlier than he suggested when tasks are simplified or made more meaningful, which implies that some failures reflected task design rather than the limits of children's thinking. Even so, the core sequence remains a useful framework for grade-level expectations, best applied by holding the sequence firmly and the ages loosely.

About the Educational Psychology course

How many college credits is Educational Psychology?
Educational Psychology (Psychology 120) carries a NCCRS credit recommendation for 3 semester credits. ACE and NCCRS have over 2,100 cooperating colleges that will consider accepting credits; the final decision is with the universities.
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$250, paid once, with lifetime access: all 100 video lessons, a practice quiz after each, the graded work and final exam, and an official transcript when you finish. Students who want several courses choose UPI Study PRO instead.
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