Book excerpt: Free and informed consent is one of the most widespread and morally important practices of modern health care; competence to consent is its cornerstone. In this book, Becky Cox White provides a concise introduction to the key practical, philosophical, and moral issues involved in competence to consent. The goals of informed consent, respect for patient autonomy and provision of beneficent care, cannot be met without a competent patient. Thus determining a patient's competence is the critical first step to informed consent. Determining competence depends on defining it, yet surprisingly, no widely accepted definition of competence exists. White identifies nine capacities that patients must exhibit to be competent. She approaches the problem from the task-oriented nature of decision making and focuses on the problems of defining competence within clinical practice. Her proposed definition is based on understanding competence as occurring in a special rather than a general context; as occurring in degrees rather than at a precise threshold; as independent of consequential appeals; and as incorporating affective as well as cognitive capacities. Combining both an ethical overview and practical guidelines, this book will be of value to health care professionals, bioethicists, and lawyers.