Forced Functions
A design constraint that keeps users in a state unless specific conditions are met.
What are Lock-ins
At a British conferences, attendees needed an instruction manual to operate this everyday object.
What is a Faucet
Often installed in large buildings, this design helps move people up or down multiple floors
What is an elevator?
Sound can act like a kind of cue for providing information when visuals aren’t enough
What is a signifier Or Auditory feedback
The term commonly for the form of Interlock when used for safety.
What is a "dead-mans switch."
When all else fails Norman advises designers to do this
What is standardization
This item has been universally accepted to represent a “save” icon.
What is a floppy disk?
Norman says that when electric cars are silent, it creates this safety issue for pedestrians
What is "when silence kills"
A design constraint used to prevent a danger from occurring.
What is a “lockout”
Norman laments that some faucets turn in a mirrored right and left where others don’t?
What is “consistency"
faucets work differently between Europe and America. This is an example of
What is cultural constraints?
Sound is as important as sight and is a reflection of what is around us.
What is "natural sound"