The fourth edition of this text acknowledges the needs and interests of nurses and health researchers, discussing the significant increase in interdisciplinary research collaboration, and the growing emphasis on Evidence-based Practice as an important research outcome across all health disciplines. . This edition includes the "best" of the measurement content, strategies, and procedures, and provides the most up to date content, strategies, and procedures available that have direct applicability for nurses and health researchers in a variety of roles including, those of student.