Confirmation bias – IB Psychology Study Notes

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

Mark Scheme SECTION A MARK SCHEME 4 marks Must Include: • Favours information confirming pre-existing beliefs • Selective attention to schema-consistent info • Belief persistence even after disconfirming evidence • Attitude polarization evidence hardens beliefs • Feedback loop: belief → selective processing → stronger belief • Named study Lord et al. death penalty • Contradictory evidence → attitude hardening Link Formula: "Participants with pre-existing belief selectively attended to supporting...