Gustav Fechner

A pioneer in experimental psychology and founder of psychophysics (techniques for measuring the mind), he inspired many 20th-century scientists and philosophers.

He is also credited with demonstrating the non-linear relationship between psychological sensation and the physical intensity of a stimulus via the formula:

[2][3] Fechner was born at Groß Särchen, near Muskau, in Lower Lusatia, where his father, a maternal uncle, and his paternal grandfather were pastors.

Fechner and his brother were then raised for a few years by his maternal uncle—the pastor, before being reunited with his mother and sisters in Dresden.

In 1817 Fechner studied medicine for six months at the Medizinische Akademie Carl Gustav Carus [de] in Dresden and from 1818 at the University of Leipzig, the city in which he spent the rest of his life.

Subsequently, recovering, he turned to the study of the mind and its relations with the body, giving public lectures on the subjects dealt with in his books.

This insight proved to be significant in the development of psychology as there was now a quantitative relationship between the mental and physical worlds.

He also wrote several poems and humorous pieces, such as the Vergleichende Anatomie der Engel (1825), written under the pseudonym of "Dr.

He proposed, in his famous 1961 paper entitled "To Honor Fechner and Repeal His Law", that intensity of stimulation is related to perception via a power-law.

During his time, it was known that the brain is bilaterally symmetrical and that there is a deep division between the two halves that are linked by a connecting band of fibers called the corpus callosum.

Fechner speculated that if the corpus callosum were split, two separate streams of consciousness would result - the mind would become two.

During the mid-twentieth century, Roger Sperry and Michael Gazzaniga worked on epileptic patients with sectioned corpus callosum and observed that Fechner's idea was correct.

[23] Fechner, along with Wilhelm Wundt and Hermann von Helmholtz, is recognized as one of the founders of modern experimental psychology.

His clearest contribution was the demonstration that because the mind was susceptible to measurement and mathematical treatment, psychology had the potential to become a quantified science.

[27] Furthermore, he influenced Sigmund Freud, who refers to Fechner when introducing the concept of psychic locality in his The Interpretation of Dreams that he illustrates with the microscope-metaphor.

He conducted experiments to show that certain abstract forms and proportions are naturally pleasing to our senses, and gave some new illustrations of the working of aesthetic association.

[10] Charles Hartshorne saw him as a predecessor on his and Alfred North Whitehead's philosophy and regretted that Fechner's philosophical work had been neglected for so long.

The conference is now scheduled to include 22 October to allow psychophysicists to celebrate the anniversary of Fechner's waking up on that day in 1850 with a new approach into how to study the mind.

A sample of a Benham's disk