“…This was followed by numerous research studies, largely North American in origin, spanning the period from the 1950s to the early 1980s. These focused not only on children's understanding of their internal anatomy (Crider, 1981 ;Eiser, Eiser, & Hunt, 1986 ;Gellert, 1962 ;Porter, 1974), but also on their concepts of health (Kalnis & Love, 1982 ;Lewis & Lewis, 1982 ;Natapoff, 1978Natapoff, , 1982, and most prolifically on their concepts of illness (Bibace & Walsh, 1980, 1981Brewster, 1982 ;Caradang, Folkins, Hines, & Steward, 1979 ;Eiser, 1985 ;Nagy, 1951 ;Neuhauser, Amsterdam, Hines, & Steward, 1978 ;Perrin & Gerrity, 1981 ;Redpath & Rogers, 1983 ;Simmeonson, Buckley, & Monson, 1979 ;Whitt, Dykstra, & Taylor, 1979). What such studies had in common, however, were clear links with the field of developmental psychology, and in particular implicit, or more usually explicit, links with the cognitive developmental theories of Piaget (summarised by Piaget & Inhelder, 1969).…”