In Human Interaction by Dix, Finlay, Abowd, and Beale, the authors discuss the importance of considering human perception and cognition when creating computers and other technological devices. 

Despite not being able to specify one theory to summarize Human-Computer Interaction, the authors identified the many factors that affect the way in which humans use and interact with computers and other devices. The following  factors are discussed throughout the chapter: which include vision, hearing, touch, memory, the human processes of thinking- reasoning and problem solving, individual differences among humans, and psychological processes. 

The authors consider humans to be “information processor[s], receiving inputs from the world, stotring, manipulating, and using information, and reacting to the information received.” These functions of human beings mirror the functions that a computer or technological device would do. The authors are placing an emphasis on the idea that in order to develop and create computers that are “suitable” for the tasks that people have in mind, they must understand how humans function. Humans are like computers. I agree with the authors in regards to the importance of understanding how humans handle devices. Human Functions and Ergonomics is something I find very interesting. For example, the way we hold a remote in our hands is something that scientists in these fields take into consideration when designing technological devices. The input of those who have used the device before is imperative when making modifications or new products. If customers do not care for the way in which a device looks, feels, or even runs, it can result in a loss of profits for that company.