The second edition of a bestseller, this book provides an understanding of the human factors issues often encountered in the design, implementation, and evaluation of products and systems. Emphasizing the close relationship between basic theory and application, the authors offer a framework for the research process and give an integrated view of the current state of knowledge regarding factors that influence human and system performance, examining how these factors can be accommodated in system design. This edition addresses such concepts as situation awareness and highlights topics of interest, with a special focus on computer applications and human-computer interaction.