Family psychologists are influenced by major trends in psychology, such as the emphasis on competency-based education, clinical training, and credentialing (Kaslow, 2004;Kaslow et al., 2004). Thus, we believe that the time is ripe to extend the core competencies in professional psychology to include family-related elements consistent with systems theory. The extant organizations devoted to promoting family psychology need to take the lead in the identification, education and training, and credentialing of family psychologists in accordance with the core competencies.A competency-based approach emphasizes the ability to apply knowledge and skills in the real world and uses performance outcomes as criteria for evaluating learners and training programs. This approach offers an explicit framework to initiate, develop, implement, and evaluate the processes and outcomes of training. The competency-based movement in psychology took center stage in 2002 at the Competencies Conference: Future Directions in Education and Training in Professional Psychology (Kaslow, 2004;Kaslow et al., 2004). Building upon prior work, eight core competencies were named:• application of scientific knowledge to practice • psychological assessment • psychological intervention • consultation and interprofessional collaboration • supervision • professional development The Wiley-Blackwell Handbook of Family Psychology Edited by James H. Bray and Mark Stanton