This book is addressed both to the professional safety practitioner and to the academic researcher. For the former, the book is oriented towards examples and practical applications in a wide range of industries, dealing with danger to both health and safety. For the latter, the book makes theoretical advances based on a broad spectrum of empirical evidence. For both groups of readers, the book provides a structured review of a substantial amount of material in the field of human factors in relation to hazards, danger and safety. The book deals with the individual as a factor in accidents, but emphasises above all the controlling role of people in relation to danger. The focus is on occupational health and safety, but much of the literature on transport and home safety is also reviewed. The book presents a systems model of the way people perceive, assess and react to danger in their environment during both routine and more complex tasks. In the first part of the book, five chapters deal in detail with the subsections of this model. The text is copiously illustrated with examples from the authors' own research as well as that of other major researchers in the field.