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Sampling is a crucial step in analytical chemistry, allowing researchers to collect representative data from a large population. Common sampling methods include random, judgmental, systematic, stratified, and cluster sampling.
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Updated: Dec 12, 2025

Measuring the Subjective Value of Risky and Ambiguous Options using Experimental Economics and Functional MRI Methods
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Order matters: How covert value updating during sequential option sampling shapes economic preference.

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Summary

Preferences are dynamically shaped by how options are sampled. Our model shows that covert pairwise comparisons during sequential sampling update values, influencing final choices and challenging standard decision theory.

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Area of Science:

  • Neuroeconomics
  • Cognitive Psychology
  • Decision Science

Background:

  • Standard decision theory posits value comparison independent of information acquisition.
  • Emerging research suggests preferences dynamically evolve during option sampling.

Purpose of the Study:

  • To investigate if preferences are dynamically shaped by iterative, covert pairwise comparisons during option sampling.
  • To propose and test a "covert pairwise comparison" model against standard decision theory and memory effect models.

Main Methods:

  • Developed a "covert pairwise comparison" model based on default-alternative comparison and preference spreading.
  • Designed a novel task where 92 participants sequentially sampled items (food, music, movies) to select a favorite.
  • Compared model performance against standard decision theory and memory-based models.

Main Results:

  • The "covert pairwise comparison" model best explained human choice behavior.
  • Option presentation order significantly influenced choices; earlier options were more likely to be selected.
  • Early presentation led to more "covert comparisons," increasing the winning option's value.

Conclusions:

  • Economic preferences are mechanistically shaped by the sequential option sampling process.
  • Covert pairwise comparisons dynamically update option values, impacting final choices.
  • Decision theory should integrate the dynamic influence of option sampling on preference formation.