High Quality Content by WIKIPEDIA articles! The Weber?Fechner law attempts to describe the relationship between the physical magnitudes of stimuli and the perceived intensity of the stimuli. Ernst Heinrich Weber (1795?1878) was one of the first people to approach the study of the human response to a physical stimulus in a quantitative fashion. Gustav Theodor Fechner (1801?1887) later offered an elaborate theoretical interpretation of Weber's findings, which he called simply Weber's law.