1) Building a good user interface requires the developer to understand how the end user learns to use the software. How does an average end user learn to interact and master an interface? What can a developer do to help the end user learn the interface more easily and more rapidly?
2) The capabilities and limitations of humans have a dramatic effect on the design of interactive computer systems. For example, end users' personalities and moods can affect their interactions with software interfaces and its usability. Why? What are some important concepts and skills an interface developer can use to better enhance the software usability based on the end user's emotional state?