How Logical Reasoning Changes With Age
Conservation: Outward Appearance Less Important Eminent psychologist Jean Piaget (1896-1980) theorized that until around age 6, children lack a clear understanding of how two things with different outward appearances might actually be the same. In a classic study, Piaget poured liquid from a tall, thin glass into a thick, short glass right in front of their eyes. Younger children thought the liquid became a smaller amount simply because the liquid’s outward appearance changed....