Ernst Weber

Born in Wittenberg in 1795, Ernst Heinrich Weber was a German anatomist and physiologist who spent much of his career at the University of Leipzig. He is widely remembered for careful experiments on the senses, especially touch, weight, and spatial perception.

Weber explored how people notice differences between stimuli, leading to the idea later known as Weber's law: that the smallest noticeable change depends on the starting intensity rather than a fixed amount. That insight became a foundation of psychophysics, the study of how physical stimuli relate to human experience.

Although trained in medicine and physiology, his influence reached far beyond those fields. His work helped shape experimental psychology and gave later researchers a practical way to measure sensation, making him an important bridge between the natural sciences and the study of the mind.