Thoroughly updated and revised to emphasize the link between research and evidence-based practice, this ninth edition of a classic textbook presents state-of-the-art methods for conducting high-quality studies. Key features: new! updated section pertaining to the & lsquomixed method of research - combining qualitative and quantitative research all new! research tips: throughout the book point out quick and key information to students new chapters: two chapters on mixed methods research which involves the blending of qualitative and quantitative data in a single inquiry. (chapters 25, 26) new: new guidelines for obtaining research funding from the national institutes of health. New: a revised model for developing and testing interventions (the 2008 medical research council framework) new: approaches to systematic reviews - from Amzon