Choice-induced preference change in the free-choice paradigm: A critical methodological review
Izuma first author. A critical methodological review with simulations and a meta-analysis. Pooling the four studies that properly addressed the free-choice paradigm's artefact gives a small but significant effect of about 0.26 in standard-deviation units, against about 0.61 in the uncorrected literature. The authors conclude that choice-induced preference change does exist but that past studies substantially overestimated it, and that the conventional paradigm should be avoided in future research.
Izuma first author. A critical methodological review with simulations and a meta-analysis. Pooling the four studies that properly addressed the free-choice paradigm's artefact gives a small but significant effect of about 0.26 in standard-deviation units, against about 0.61 in the uncorrected literature. The authors conclude that choice-induced preference change does exist but that past studies substantially overestimated it, and that the conventional paradigm should be avoided in future research.
Written from the full text read 2026-10-18.
What our sources record
Recorded when this source was checked, figures included, with page references and quotation marks removed.
Izuma, K., & Murayama, K. (2013). Choice-induced preference change in the free-choice paradigm: A critical methodological review. Frontiers in Psychology, 4, 41. doi:10.3389/fpsyg.2013.00041.