Whether used to help students learn how to perform research or how to critically appraise research reports for use in practice, this authoritative, approachable textbook shows how nursing research is applicable across today's changing healthcare field. AJN award-winning authors Denise Polit and Cheryl Beck detail the latest methodologic innovations that have arisen in nursing, medicine, and the social sciences in their signature user-friendly style, accompanied by the helpful learning features, pedagogy, and clean design that have made this book a classic. The updated 11th Edition adds two new chapters designed to help students ensure the accuracy and effectiveness of research methods and the relevance and applicability of nursing inquiries. Extensively revised content throughout strengthens students' ability to locate and rank clinical evidence, verify the authoritativeness of systematic reviews, and distinguish interpretive approaches from aggregative approaches using meta-aggregatio