I n 2008, the Accreditation Council for Graduate Medical Education began development of the Next Accreditation System, an assessment strategy based on residents’ achievement of specific milestones within defined competencies as they progress through training. Medical specialties were tasked with creating milestones specific to their training programs. Although similar competency frameworks were...

AIM To describe the methods used to standardize the assessment of motor milestones in the WHO Multicentre Growth Reference Study (MGRS) and to present estimates of the reliability of the assessments. METHODS As part of the MGRS, longitudinal data were collected on the acquisition of six motor milestones by children aged 4 to 24 mo in Ghana, India, Norway, Oman and the USA. To ensure standardi...