Human information processing theory is based on the idea that humans process the information they receive, rather than merely responding to stimuli. The theory includes human memory system such as sensory memory, working memory, long-term memory, perception and attention.

1. What is attention? What kind of role does it play during human information processing? For interface designers, what is the importance of understanding how human manage attention?

2. People can perceive the same information differently; what kind of factors affect human information perception? Discuss why perception should be taken into account when creating the user interface for any application or website. Provide example to support your answer.