Until recently, physician–historians of pediatrics have generally assumed that “pediatrics as a specialized branch of medicine had no real existence before the middle of the nineteenth century.”1 This may be true if we equate pediatrics with professional organizations and specialized children’s hospitals.2,3 But as a body of knowledge and practices addressing the sick child, pediatrics has a mu...

McGrath (2005/this issue) has published a very significant article; it is significant because it examines the substantive issue of construct validity in a simple and informative way, noting the confusions apparent in how constructs and their variables are defined, used, and interpreted within the domain of personality and individual differences. This is a careful, thoughtful, article that quiet...