IB Psychology SL Topic 4 — Thinking & Learning Paper 1 & 2 Cognitive approach ~9 min read

Schema Theory: The Mind’s Shortcuts

You remember a lecturer using slides. They never did. Your mind filled the gap with what lectures usually contain, and you cannot tell the difference between the bit you saw and the bit you supplied. That is a schema doing its job a little too well.

📚 What you need to know

Useful, subjective and slightly unreliable

Schemas are not right or wrong. They are simply the product of what you have assimilated, which makes them subjective. Two people’s schemas for the same thing will overlap but will never be identical, because they were built out of different experiences.

That is fine until recall is involved. When you try to remember an event, gaps get filled with what you expect rather than what actually happened. Ask a witness about a pub fight and they may report blood that was never there — because their schema for ‘fight’ includes blood.

Key study: Bartlett (1932)

Bartlett gave British students a folk tale from a culture they knew nothing about, then watched what happened as it was passed along.

Part of the studyWhat happened
AimTo investigate the effect of cultural schemas on recall of a culturally unfamiliar story.
Participants20 male students at the University of Cambridge, UK.
ProcedureA technique called serial reproduction. One participant read a Native American folk story, ‘The War of the Ghosts’, then wrote out his version. That version was read to a second person, who wrote his own, which was read to a third, and so on down the chain.
ResultsThe final versions bore little similarity to the original. Three kinds of change appeared: omission, assimilation and levelling.
ConclusionCultural schemas contribute to the reconstructive nature of memory. Remembering is an active process in which existing knowledge and expectations interfere with accuracy.
Serial reproduction: the story shrinks and shifts Each person rewrote what the last person had written Original story about 350 words Retelling 1 already shorter Retelling 2 shorter still Final version around 180 words Omission: unfamiliar or unpleasant details vanish Assimilation: canoes become boats, paddling becomes rowing Levelling: the story gets shorter and simpler each time Each person rewrote the story to fit what already made sense to them Memory here is not a recording; it is a reconstruction
The word count is the easiest evidence to quote: roughly 350 words became roughly 180.

The three changes in detail

The added ‘therefore’ and ‘because’ are the most revealing detail in the whole study. Nobody was told to make the story logical. They did it because a story that does not make sense is uncomfortable to hold in mind.

Evaluating schema theory

What is strong about it

What is weaker about it

Link to concepts

EXAM PRACTICE

Evaluate schema theory with reference to one study. [22]

Step 1: define schema A mental representation built from assimilated experience, subjective, guiding understanding through schematic activation. Step 2: state the effect on memory Schemas fill gaps with expectation, so recall is reconstructive rather than reproductive. Step 3: the study Bartlett (1932). 20 Cambridge students, serial reproduction of ‘The War of the Ghosts’. Step 4: the three changes Omission, assimilation, levelling — roughly 350 words down to roughly 180. Step 5: evaluate on both levels Study: small elite male sample, poor controls, possible low effort, dated so temporal validity is questionable. Theory: schemas are subjective and hard to measure, but the concept applies widely, including to depression. Definition + effect + study + three changes + two-level evaluation Bartlett’s weak controls are the criticism that separates a good answer from an average one.

💡 Exam tip

⚠ Common mix-up

Up next: Social Learning Theory in Practice — the last page of 4.1, where learning moves out of the lab and into families and cultures.

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