What is jnd?
In the field of psycho-physics (that branch of experimental psychology that studies sensation and perception) a jnd (Just Noticeable Difference) 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. Norman’s goal is to make a noticeable difference — many jnd’s worth — in human-centered technology. You will learn that when it comes to interface design, Norman could be considered a minimalist.
- Our starting point is Wikiquote
- Q and A Session (You Tube Interview)
- Here is a link to his original Website at UC San Diego where he is Professor Emeritus
- Finally, here is the link to his jnd site.
His seminal work: the Design of Everyday Things is as important as it sounds.

ok..ok so where do we go from here? Being a video guy, I have to show you a couple of them:
Video #1: Design and Emotional Response
Video #2: The Design of Future Things
Another good guy in this arena (mostly on good Web and usability design):
- Jakob Neilson He is now a partner with Norman but his niche seems to be web design .. take a look at why he does not include graphics on his Web site. an interesting perspective…

Write a small reflection (about two paragraphs) to tell me that have read all of this and have synthesized an opinion… I have given you some things to chew on.. plus at least one dissenting view…
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- Do you agree or disagree with Norman’s basic premise?
- Why do you think I have included him in our discussions on interactive design?
- What is applicability/relevance of Norman’s ideas on just normal design to educational settings?
- Find one or two more individuals who also have entered into this arena (Google them) and explain their niche.. what new do they bring to the table? why should/should not bring them into our discussions in this course?
Post your thoughts in the drop box set up on Canvas.