Authored on behalf of the Sigma Theta Tau International 2005-2007 Research and Scholarship Advisory Committee: Laura Cullen, RN, MA, APN, Evidence-Based Practice Coordinator, Research, Quality and Outcomes Management, Department of Nursing Services and Patient Care, University of Iowa Hospitals and Clinics, Iowa City, Iowa. Alba DiCenso, RN, PhD, CHSRF/CIHR Chair in Advanced Practice Nursing, Director of the CHSRF/CIHR Ontario Training Centre in Health Services and Policy Research, McMaster University School of Nursing, Hamilton, Ontario, Canada. Rhonda Griffiths, RN, Cm, BEd Nursing, MSc(Hons), PhD, Professor of Nursing, University of Western Sydney, Director of the South West Sydney Centre for Applied Nursing Research (CANR), Director of the NSW Centre for Evidence Based Health Care (The Joanna Briggs Institute), Sydney, New South Wales, Australia. Brendan McCormack, RGN, DPhil(Oxon.), BSc(Hons.), PGCEA, RMN, DPN Coordinator, Director of Nursing Research and Practice Development, Royal Group of Hospitals, Belfast and University of Ulster at Jordanstown, Adjunct Professor, Faculty of Medicine, Nursing & Health Sciences, Monash University, Melbourne, Australia Belfast, Northern Ireland. Jo Rycroft-Malone, RN, PhD, MSc, BSc(Hons), Wales Reader in Health Services Research; Centre for Health-Related Research; School for Healthcare Sciences; College of Health & Behavioural Sciences; University of Wales, Bangor, Wales.