IB Psychology Topic 2.2.5 Confirmation Bias Revision Notes (SL/HL)

IB Psychology Topic 2.2.5 Confirmation Bias Revision Notes (SL/HL) | RevisionDojo

Written by official IB examiners

Confirmation Bias Shapes How We Interpret Information

Confirmation bias is the tendency to seek, interpret, and remember information that supports pre-existing beliefs while ignoring contradictory evidence.
This bias plays a crucial role in shaping how we perceive the world and make decisions.

Example

In politics, individuals often read news sources that align with their views, reinforcing their beliefs while dismissing opposing perspectives.
Similarly, stereotypes are maintained by interpreting behavior through biased expectations, such as assuming a person is unfriendly based on preconceived notions about their social group.

Key Study:

Case study

Wason's Selection Task (1968)

Aim: To investigate how people test hypotheses and whether they seek to confirm rather than disprove their beliefs.

Method:

Participants were presented with a set of four cards, each showing a number or a letter (e.g., A, D, 4, 7).
They were given a rule: "If a card has a vowel on one side, then it has an even number on the other side."
Participants were asked to select the cards they needed to turn over to test the rule.

Results:

Most participants chose cards that could confirm the rule (e.g., A and 4) rather than those that could potentially disprove it (e.g., 7).
Few participants selected the correct combination (A and 7), which would test both confirmation and falsification of the rule.

Conclusion:

Participants demonstrated confirmation bias by seeking evidence that supported the rule rather than looking for evidence that could disprove it.
This bias highlights a tendency to favor information that aligns with existing beliefs.

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Note

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Tip

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
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Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
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IB Psychology 2.2.5 Confirmation Bias Notes

Confirmation Bias Shapes How We Interpret Information

Key Study:

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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Confirmation Bias Shapes How We Interpret Information

Key Study:

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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1. Concepts6 subtopics

2. Content4 subtopics

3. Contexts4 subtopics

4. Extensions (HL only)4 subtopics

IB Psychology 2.2.5 Confirmation Bias Notes

1. Concepts6 subtopics

2. Content4 subtopics

3. Contexts4 subtopics

4. Extensions (HL only)4 subtopics

Confirmation Bias Shapes How We Interpret Information

Key Study:

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account

Confirmation Bias Shapes How We Interpret Information

Key Study:

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account