INFORMATION PROCESSING
Information processing lies at the heart of human performance. This chapter describe the characteristics of the different important stages of information processing, from perception of the environment to acting on that environment. It begins by contrasting different ways in which information processing has been treated in applied psychology, and then describes processes and transformations related to attention, perception, memory and cognition, action selection, and multiple-task performance. The chapter adopts as a framework the information-processing model depicted. Stimuli or events are sensed and attended and that information received by the sensory system is perceived, that is, provided with some meaningful interpretation based on memory of past experience. The chapter also describes the means by which comprehension is achieved. It provides information on the unification subsystem, including the corpus of knowledge it requires and the operations it performs.