Science // Scientific Inquiry

Changing Your Mind with Evidence

Be willing to change your mind when evidence doesn't support your prediction — a result that surprises you is more valuable than one that confirms what you already thought

Ages
6 to 8
Type
Thinking skill
Builds on
2 topics
Leads to
1 topic

Quick check

If the learner predicts what will happen in an experiment and gets a different result, do they accept the evidence rather than deciding the experiment must have gone wrong?

Ask this to see whether the topic is secure.

Topic // Mastery

What mastery looks like

What a learner can do once this topic is secure.
  • belief revision in children research (PMC 2020)
  • hypothesis testing and argumentation from evidence in young children

Topic // Map

Where this fits

What to learn first and what this topic opens up, with the reason for each link. Required links come first.
  • RequiredMust come first
  • HelpfulHelps, but not essential

Before this

2 topics
  • Observation vs InterpretationRequired

    Scientific Inquiry // Ages 6 to 7

    Being willing to revise a hypothesis requires first distinguishing observation from interpretation — you can only update your interpretation if you recognise it as separate from the data

  • Learning from MistakesHelpful

    Learning to Learn // Learning to Learn // Ages 8 to 9

    Changing your mind when evidence contradicts your prediction is the science form of the universal error-analysis habit — treating surprises as information rather than failures

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Changing Your Mind with Evidence

Ages 6 to 8 // Thinking skill

Leads to

1 topic
  • Could there be another explanation?Required

    Scientific Inquiry // Ages 7 to 9

    Actively seeking alternative explanations requires first having the habit of not defending your original interpretation against the evidence

Topic // Research-informed

Teaching notes

From the Marble Skill Taxonomy. These notes have not been validated in classrooms, so treat them as a starting point for your own judgement.

The approach

For ages 6–8, teach the disposition of changing your mind when evidence contradicts your prediction: a prediction-breaking surprise is a highly informative result, not a failure. Learners commit a prediction visibly before testing, confront a genuine mismatch, and explicitly update their idea (not the recorded data), while resisting confirmation bias. Builds on separating observation from interpretation.

Common misconceptions

  • Thinking a wrong prediction means you failed, rather than that you learned something.
  • Ignoring, dismissing, or re-reading a result so it seems to fit the original prediction (confirmation bias).
  • Believing scientists are people who are always right, rather than people who update when wrong.
  • Changing the RECORDED data to match the prediction instead of changing the idea.
  • Treating a confirming result as more valuable than a surprising one.
  • Feeling that admitting 'I changed my mind' is weakness rather than good science.

Useful representations

  • Predict → Observe → (surprise?) → Update cycle
  • A committed-prediction card set beside the actual-result card for direct comparison
  • 'I predicted … but I observed … so I changed my mind' sentence frame
  • A 'surprise = treasure' badge that rewards prediction-breaking results
  • Confirmation-bias 'magnet' image — the pull to keep only results that agree

Teaching practices

  • Have children COMMIT a prediction in writing/visibly before testing, so the later mismatch is honest and undeniable.
  • Explicitly celebrate surprising, prediction-breaking results as the most interesting — build a classroom norm that 'I was wrong, and here's what I learned' is high status.
  • Model belief revision aloud: 'I thought the big one would sink faster — it didn't — so I need a new idea'.
  • Name confirmation bias in kid terms: the pull to notice only the results that agree with you, and how to resist it.
  • Separate the data from the ego — lean on observation-vs-interpretation so it's the IDEA that changes, not the child that 'failed'.
  • Use predict–observe–explain cycles with genuinely counter-intuitive outcomes so revision is regularly required, not rare.

Activities to try

  1. 1

    Predict-o-Tron: lock it in, then watch

    Why it works: The mismatch between what I guessed and what happened is not me failing — it is me learning. A surprising result taught me more than a confirming 'I was right' would have.

    1. Face a genuinely counter-intuitive challenge, choosing one setup for this run — e.g. two solid balls (not hollow), one big and heavy, one small and light, released at the same moment from the top of identical ramps (which reaches the bottom first?), OR two objects placed in water (which sinks and which floats?).
    2. Commit your prediction visibly and in a way you cannot quietly retract — say or write 'I predicted the big one', and pin that choice where it stays visible.
    3. Run the test and watch the actual outcome within the setup you chose (e.g. the two solid balls arrive at about the same time, give or take a small difference; or an object floats/sinks unexpectedly).
    4. When the result breaks your prediction, perform an explicit 'update my idea' move within the setup you ran: for the ramp, drag your idea-token from 'the big one is faster' to a new bin you name yourself; for the float test, drag it from 'the big one sinks' to a new idea you name — change the idea, not the data.
    5. Say the sentence frame aloud: 'I predicted X, but I observed Y, so I've changed my mind.'
  2. 2

    Spot the confirmation-bias move

    Why it works: There is a strong pull to notice only results that agree with you; a good scientist counts the disagreeing results too and lets the whole evidence decide.

    1. Across several trials, keep a tally of every result — including the ones that disagreed with your prediction, not just the ones that agreed.
    2. Notice when you only remembered or valued the trials that fit your guess, and name that pull (the 'magnet' that makes you keep only agreeing results).
    3. Decide what the full set of results — including the surprising ones — says about your idea.
  3. 3

    Talk it through: 'I was wrong, and that's great'

    Why it works: Changing your mind in light of evidence is normal, high-status science — not weakness or embarrassment.

    1. Talk with an adult or in-role character who asks: 'What did you predict? What happened? So what will you do with your idea now?'
    2. Hear the adult/character share their OWN belief-change story ('I thought the big one would sink — but it floated — so I need a new idea').
    3. Describe aloud how you feel about being surprised and practise treating it as curiosity, not shutdown.

Science // Scientific Inquiry

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