Used hypothetical vignettes to examine the development of children's and adolescents' understanding of nurturance and self-determination rights. Found that 8- to 12-year-olds were significantly less likely than 14- to 16-year-olds to identify nurturance and self-determination rights as salient. Reasoning about self-determination rights, but not nurturance rights, showed an age-related progression from concrete to abstract. (Author/KB)