This groundbreaking text is the most complete and detailed book devoted to middle-range theories and their applications in clinical nursing research. The book thoroughly explains the process of selecting an appropriate theory for a particular nursing research study and sets forth criteria for critiquing theories. Each chapter includes examples of research using middle-range theories, definitions of key terms, analysis exercises, reference lists, and relevant Websites. Instruments are presented in appendices. New features of this edition include analysis questions for all theories; new chapters on learning theory and physiologic middle-range theories; "Part" introductions to frame the selection process for each middle-range theory chosen; and a glossary of terms.