Anchoring bias – IB Psychology Study Notes

Comprehensive IB Psychology study notes on Anchoring bias. Covers key theories, research studies, and evaluation points for the 2027 syllabus.

Mark Scheme SECTION A MARK SCHEME 4 marks Must Include: • First information presented = anchor • Insufficient adjustment mechanism • Anchor restricts judgment range despite being arbitrary • Named study Tversky & Kahneman wheel of fortune • Two anchor conditions 10 vs 65 • Biased estimates UN membership estimates • Arbitrary anchor produced systematic bias Link Formula: "The arbitrary anchor value constrained estimates toward direction, showing outcome despite knowing the anchor was irrelevant."...

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