jnd: just noticeable difference

In the field of psychophysics, that branch of experimental psychology that studies sensation and perception, a jnd is the amount that something must be changed for the difference to be noticeable, defined to mean that the change is detectable half the time. My goal is to make a noticeable difference -- many jnds worth -- in human-centered technology.

I started my career as an experimental/mathematical psychologist in psychophysics, and my love of the exquisite sensitivity and dynamic range of hearing and seeing, as well as the power of human perception has stayed with me.

For the definition of jnd as used in psychophysics, see the Wikipedia definition.

Updated November 17, 2018
I am declining travel requests not directly related to the University of California, San Diego Design Lab. (Not all trips are listed.)

February 6, 2019: Keynote. 21st Century Design
   IxDA Interaction 19 conference, Seattle, WA (Not yet shown on the website)
(I depart Feb. 7 for Dubai)

February 10-12, 2019: Keynote: Community-Driven Design
   World Government Summit. Dubai, United Arab Emirates

February 14-15. 21st Century Design
   National Institute of Design Celebration. Ahmedabad, India

February 16-24. Community-Driven Design
   Bengaluru, India
(I have a full schedule, visiting numerous communities)

May 10, 2019. Tsinghua University, Beijing
   Advisory Board Meeting

March 30, 2019: Keynote: 21st Century Design
   Krupa (Interface Conference). Kyiv (Ukraine).

May 14-16, 2019. Princeton University
   Smart Driving Car Summit. (Organized by Prof. Alain Kornhauser, Princeton University, Princeton, NJ)