Learning by Adjusting: Assimilation and Accommodation

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Learning by Adjusting: Assimilation and Accommodation

Educational Psychology · Chapter 4: Cognitive and Social Development in ChildrenSection 4.3 · lesson 30 of 1009 min · free with a free account

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In this lesson

Why correct information often fails, and what replaces a misconception.

  • Define assimilation and explain cognitive conservatism
  • Explain how over-assimilation produces misconceptions
  • Describe accommodation and its cognitive cost
  • Apply conceptual change strategies to a stubborn misconception

Transcript

Everything said in the video, section by section (1,152 words). Read along, or search it.

Cognitive and Social Development in Children

Learning by Adjusting: Assimilation and Accommodation

A student can hear a correct explanation and still believe the wrong thing. Not out of stubbornness, and not from inattention. The explanation got absorbed into a framework that survived it. This section is about those two possibilities. New information can be bent to fit what you already think. Or what you already think can be rebuilt to fit the information. Piaget called those assimilation and accommodation. We will look at what each buys, and what each costs. Then at misconceptions, which are assimilation gone wrong. And at four strategies for producing real conceptual change.

Assimilation

Fitting the World Into What We Know

Assimilation is what happens most of the time. A learner encounters new information. They interpret it through an existing schema. The new information is made to fit what is already known. And the underlying cognitive structure does not change. It is the mind's default strategy, and it has a name. Cognitive conservatism. Preserve the framework, extend its application. Most of the time this is not only efficient but correct. A child who knows the concept bird can assimilate a robin. And a sparrow, and a pigeon, without difficulty. No new mental category has to be built for each one. Imagine learning if that were not possible.

The Limit

When Fitting Becomes Distorting

But assimilation has limits, and they show up as errors. When new information is sufficiently different from the schema, forcing it into that framework produces a distortion. Here is a clean example of the failure. A child calls a penguin a bird that flies. They have squeezed a non-flying bird into a schema that requires flight. The category was preserved. The fact was damaged. Misconceptions formed this way are among the hardest teaching problems. Because they were built by ordinary, successful cognition. Students often resist revising well-established schemas. They resist even when presented with directly disconfirming evidence. The evidence just gets assimilated too.

Accommodation

Changing What We Know to Fit the World

Accommodation is the alternative, and it costs more. It occurs when new information is genuinely incompatible with a schema. So incompatible that the schema itself must change. Notice the direction of the change here. The learner does not distort the new information to fit the old framework. Instead, the framework is restructured. It is rebuilt to genuinely incorporate the new reality. This is cognitively more demanding than assimilation. It requires the learner to tolerate disequilibrium. To tolerate it long enough for real restructuring to occur. That tolerance is the hard part, and it is not evenly distributed. But accommodation is how qualitative conceptual growth happens.

Scale

From Small Adjustments to Stage Transitions

Accommodation comes in very different sizes. At the small end, a minor schema adjustment. Adding some birds cannot fly, as a qualification to a bird schema. The schema survives, with an exception attached. At the large end sit the reorganizations Piaget linked to stage transitions. Consider the shift from preoperational to concrete operational thinking. That involves a profound accommodation. The child's understanding of quantity, number and physical properties changes. All of it reorganizes around the principle of conservation. And reorganizations on that scale do not happen overnight. They represent weeks or months of repeated encounters. Repeated encounters with information that does not fit.

Key Idea

Efficient Versus Deep

Here is the key idea, and it is a trade-off rather than a ranking. Assimilation makes learning efficient. Accommodation makes it deep. You need both, and a lesson can fail by lacking either one. So the best instruction does two things at once. It provides enough familiar context for students to assimilate the new material. And it introduces enough challenge to require genuine accommodation. That balance, between the known and the new, is at the heart of effective lesson design. Notice that it is a balance rather than a preference. All challenge is not better. It is a different way of failing.

Misconceptions

Why Correct Information Often Fails

This distinction earns its keep when you meet a stubborn misconception. Take a student who believes heavier objects always fall faster. They have seen many things fall, and they were paying attention. So what went wrong? They have assimilated numerous observations into a faulty schema. Rather than accommodating the evidence that contradicted it. Every observation was made to fit the belief they already had. Which explains why the obvious remedy fails. Simply presenting correct information is usually not enough. The correct information gets assimilated too, or discounted. The teacher has to create conditions for genuine disequilibrium. Only that motivates accommodation.

Conceptual Change

Four Strategies That Actually Work

Conceptual change theory builds directly on this framework. It identifies several strategies for inducing productive accommodation. First, make the misconception explicit, and test it. Do not skip past it politely. Second, provide dramatic demonstrations that create undeniable disconfirmation. Undeniable is the operative word. Third, have students predict outcomes, then observe the actual result. The prediction is what makes the result matter. Fourth, facilitate discussion where students articulate and defend their schemas. Defend them first, and be challenged afterward. All four are far more effective than telling students they are wrong. Because each one makes the student's own schema the thing being tested.

Compared

Two Processes, Six Differences

Put the two processes side by side on six features. Does the schema change? Assimilation, no. Accommodation, yes. Cognitive demand. Assimilation is low, efficient and automatic. Accommodation is high, and requires tolerating disequilibrium. Type of learning. Assimilation gives surface, incremental learning. Accommodation gives deep conceptual restructuring. Risk. Assimilation can produce or reinforce misconceptions. Accommodation can be resisted, if the disequilibrium feels threatening. Instructional trigger. Assimilation needs a familiar context with small additions. Accommodation needs challenging problems and conceptual conflict. And an example of each. A child correctly calling a husky a dog is assimilation. A child learning that wolves and dogs are different species is accommodation.

In Practice

Two Balls, One Drop

Here is conceptual change engineered in one physics lesson. The teacher discovers a widespread belief in her class. Most students believe a heavier ball falls faster than a lighter one. She does not correct them, which is the interesting decision. First, she has the class predict the outcome out loud. Now they are committed to their schema, publicly. Second, she drops balls of different weights from the same height. Simultaneously, so there is nothing to argue about. They land at the same time. Students are visibly surprised, and that surprise is the whole point. The evidence cannot be assimilated. It is too direct. Then guided discussion builds a new schema. Without air resistance, mass does not affect the rate of fall. The misconception is replaced, rather than merely suppressed.

Lesson Design

The Question to Ask Yourself

So when you design a lesson, hold two questions at the same time. Am I giving students enough familiar scaffolding? Enough for them to assimilate the new content at all. And am I providing enough challenge? Enough to require genuine accommodation rather than comfortable fitting. Both failure modes are real, and both are common. Lessons that are all assimilation produce shallow learning. Everything makes sense, and nothing changes. Lessons that require constant accommodation without support produce frustration. And then disengagement, which is harder to reverse. That second failure is the more sympathetic of the two. It does just as much damage.

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FAQ

Questions students ask us

About Learning by Adjusting: Assimilation and Accommodation

What is assimilation in Piaget's theory of learning?
Assimilation is interpreting new information through an existing schema so that it fits what is already known, without changing the underlying structure. It is the mind's default strategy, sometimes called cognitive conservatism, and it is usually efficient and correct. A child who knows the concept of a bird can assimilate a robin, a sparrow and a pigeon without building a new mental category for each one.
How does assimilation lead to misconceptions?
Assimilation leads to misconceptions when new information is too different from a schema and gets forced into it anyway, distorting the fact to preserve the category. A child who calls a penguin a bird that flies has squeezed it into a schema that requires flight. Such misconceptions are hard to change because students often assimilate or discount even directly disconfirming evidence, so simply presenting correct information is usually not enough.
What is accommodation and why is it harder than assimilation?
Accommodation is restructuring a schema so it genuinely incorporates new information that is incompatible with it, rather than distorting the information to fit. It is more cognitively demanding because the learner has to tolerate disequilibrium long enough for real restructuring to happen. Accommodation ranges from small adjustments, such as adding that some birds cannot fly, to the large reorganizations Piaget linked to stage transitions, like the shift to understanding conservation.
How can teachers help students overcome a stubborn misconception?
Conceptual change strategies work better than telling students they are wrong: make the misconception explicit and test it, use dramatic demonstrations that clearly disconfirm it, have students predict outcomes before observing, and let them articulate and defend their ideas in discussion. For example, students who predict a heavier ball will fall faster can watch balls of different weights dropped together land at the same time, which creates disequilibrium and motivates accommodation.

About the Educational Psychology course

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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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