Annual Meeting
Fechner Day brings together researchers working on psychophysical theory, methods, and applications.
International Society for Psychophysics
From Fechner’s 1860 foundations to modern perception science.
Since Fechner established psychophysics in 1860, the field has asked how physical stimuli become perceptual experience. ISP supports the international community advancing that question today.
Society
What ISP Maintains
Proceedings
The society preserves proceedings and conference records from past annual meetings.
Membership
Membership fees help sustain the society and support student participation.
Current Meeting
Fechner Day 2026
The 42nd Annual Meeting of the International Society for Psychophysics will be held at Umeå University, Sweden.
Open conference pageArchive
Proceedings
Browse proceedings from past Fechner Day meetings, including recent annual meetings and historical volumes.
Open proceedings archiveLatest
News
Fechner Day 2026
Save the Date: Fechner Day 2026 – Umeå, Sweden October 20–22, 2026 We are pleased to announce that the 42nd Annual Meeting of the International …
Fechner Day 2025
We are delighted to invite you to the 41st meeting of the International Society for Psychophysics, celebrating Fechner Day 2025. We carefully …
Yuko Yamashita continues to encourage us
Author: Dr. Yoshitaka Nakajima (Fukuoka, Aug. 15th, 2023) Almost one thousand days have passed since our colleague, Yuko Yamashitaʼs, passing. On the …
Community
In Memoriam
Yuko Yamashita continues to encourage us
Author: Dr. Yoshitaka Nakajima (Fukuoka, Aug. 15th, 2023) Almost one thousand days have passed since our colleague, Yuko Yamashitaʼs, passing. On the …
Robert Teghtsoonian, im memoriam
Martha Teghtsoonian Robert Teghtsoonian (1932-2017) was born in Toronto, Canada, where his parents had emigrated from Armenia in the wake of the …
Eugene Galanter (Oct. 27, 1924 – Nov. 9, 2016)
Photo courtesy of Mrs. Patricia Galanter Imagine Gene Galanter in military uniform atop a hill. He is looking at the vast expanse of human behavior …