[4Xin2] Poster session 2

[4Xin2-42] Verifying whether the Time course of the Anchoring Effect can be Explain by Variational Bayes

〇Airi Ono¹, Fumiya Komatsu¹, Kazuki Takahashi¹, Isao Ozawa¹, Takashi Takekawa¹ (1.Kogakuin University)

Keywords:cognitive bias, Variational Bayes, anchoring effect, Bayesian brain

In decision-making, cognitive biases like the anchoring effect can unconsciously skew judgments. This phenomenon involves using a presented number as an anchor, influencing subsequent responses. The responses vary based on the anchor, and the effect weakens when answers deviate significantly. The Anchoring-and-Adjustment concept suggests that initial responses are close to the anchor, adjusting over time to a plausible range. Previous research, inspired by the Bayesian Brain hypothesis, qualitatively replicated the mechanism through Bayesian updates. However, specific computational processes for subsequent responses need further exploration. This study employs variational Bayesian methods, assuming the brain iteratively considers anchors and expectations. It investigates how iteration influences the anchoring effect and examines the computational processes underlying responses with different iterations. Results show differences in responses based on iteration, providing insights into its influence. The study highlights methods individuals employ in generating responses through iterative consideration of anchors and expectations.