JBI's Systematic Reviews: Study Selection and Critical AppraisalPorritt, Kylie PhD; Gomersall, Judith PhD; Lockwood, Craig PhDAJN, American Journal of Nursing: June 2014 - Volume 114 - Issue 6 - p 47–52 doi: 10.1097/01.NAJ.0000450430.97383.64 Systematic Reviews, Step by Step Abstract In Brief Author Information This article is the fourth in a series on the systematic review from the Joanna Briggs Institute, an international collaborative supporting evidence-based practice in nursing, medicine, and allied health fields. The purpose of the series is to describe how to conduct a systematic review—one step at a time. This article focuses on the study selection and critical appraisal steps in the process. These steps ensure that the review produces valid results capable of providing a useful basis for informing policy, clinical practice, and future research. The fourth article in a series from the Joanna Briggs Institute focuses on the study selection and critical appraisal steps in the process of conducting a systematic review. Kylie Porritt is a research fellow at the Joanna Briggs Institute in the School of Translational Health Science, University of Adelaide, South Australia, where Judith Gomersall is a research fellow at the National Health and Medical Research Council Centre for Research Excellence in Aboriginal Chronic Disease Knowledge Translation and Exchange, and Craig Lockwood is an associate professor in Implementation Science. Contact author: Kylie Porritt, firstname.lastname@example.org. The authors have disclosed no potential conflicts of interest, financial or otherwise. The Joanna Briggs Institute aims to inform health care decision making globally through the use of research evidence. It has developed innovative methods for appraising and synthesizing evidence; facilitating the transfer of evidence to health systems, health care professionals, and consumers; and creating tools to evaluate the impact of research on outcomes. For more on the institute's approach to weighing the evidence for practice, go to http://joannabriggs.org/jbi-approach.html. © 2014 Lippincott Williams & Wilkins. All rights reserved.