Weber's Law: A Mechanistic Foundation after Two Centuries
Related Experiment Video
Updated: Jan 5, 2026

An Analog Macroscopic Technique for Studying Molecular Hydrodynamic Processes in Dense Gases and Liquids
Published on: December 4, 2017
Jeroen Brus1, Joseph A Heng1, Rafael Polanía1
1Decision Neuroscience Laboratory, Department of Health Sciences and Technology, Eidgenössische Technische Hochschule (ETH) Zurich, Zurich, Switzerland.
Abstract:
Weber's law appears to be a universal principle describing how we discriminate between physical magnitudes. However, this law remained purely descriptive for nearly two centuries. A study by Pardo-Vazquez et al. finally provides a mechanistic explanation, revealing how both accuracy and reaction-time performance lawfully emerge during sensory discrimination tasks.
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