The Humane Interface
0.1 seconds is the limit for feeling that the system is reacting instantaneously. 1 second is the limit for the user’s flow of thought to stay uninterrupted, even though the user will notice the delay. 10 seconds is the limit for keeping attention focused on the ongoing interaction.
Irene Pereyra • Universal Principles of UX: 100 Timeless Strategies to Create Positive Interactions between People and Technology (Rockport Universal)
This calls for an attractive, pleasant environment so that in normal monitoring, the operators are creative and open to explore new situations. Once some plant parameter approaches a dangerous level, however, the design should change its stance, yielding a negative affect that will keep the operators focused upon the task at hand.
Don Norman • Emotional Design: Why We Love (or Hate) Everyday Things
When people use something, they face two gulfs: the Gulf of Execution, where they try to figure out how it operates, and the Gulf of Evaluation, where they try to figure out
Don Norman • The Design of Everyday Things
As I noted earlier, the ideal instrumental interface for any task or problem is a magic button that can (1) read the user’s mind perfectly to understand the desired task, and (2) perform it instantly and completely to the desired specifications.
In absence of such a perfect button, you, the designer, must conceive of the closest possible approximati... See more
In absence of such a perfect button, you, the designer, must conceive of the closest possible approximati... See more