From GUI to E(motional) UI

How ironic that we think we can get more exact results from our computers by emulating human interaction, but when we want exact results from human interaction, we unintentionally emulate computers. Engineering, air traffic control, legal contracts--in all endeavors where precise communication is critical--our success has depended on washing out human emotion and natural language in favor of formal procedures and protocols, complete with a detailed domain-specific language.

Agro, Leandro. UXmatters (2006). Articles>User Centered Design>User Interface>Emotions

Panic! How it Works and What To Do About It

When we create technologies that are extremely complex and do not provide comprehensive feedback for each and every possible error, such as a seat belt left unbuckled, people have a tendency to drive their aircraft into garden parties. When we create technologies where similar actions produce dissimilar results, such as placing a brake and accelerator pedal side-by-side, to be actuated in the identical manner by the identical limb, people will periodically die.

Tognazzini, Bruce. Nielsen Norman Group (2004). Design>User Interface>User Centered Design>Emotions