The world s most widely used nursing research textbook, Essentials of Nursing Research, Tenth Edition equips students with everything they need to confidently apply research to nursing practice. AJN award-winning authors Denise Polit and Cheryl Beck clarify the language of nursing research and instill a practical understanding of nursing research fundamentals and the research process for both quantitative and qualitative studies   including design principles; sampling and data collection; criteria for assessing data quality; appraising the quality, rigor, and trustworthiness of studies; and approaches to understand the statistical results.