Psychological essentialism is the belief that some internal, unseen essence or force determines the common outward appearances and behaviors of category members. We investigated whether reasoning about transplants of bodily elements showed evidence of essentialist thinking. Both Americans and Indians endorsed the possibility of transplants…

George Sarton had a strong influence on modern history of science. The method he pursued throughout his life was the method he had discovered in Ernst Mach's "Mechanics" when he was a student in Ghent. Sarton was in fact throughout his life implementing a research program inspired by the epistemology of Mach. Sarton in turn inspired many…

This paper explores some of the intellectual forces and themes connected to the emergence of the child study movement as a focus of scientific interest and research. This analysis is followed by a look at some institutional and social developments, which, it has been suggested, created needs and demands for the systematic study of children.…