Similarly, younger children center on one aspect of any problem or communication at a time. Perhaps the most famous example of the preoperational child’s centrism is what Piaget refers to as their inability to conserve liquid volume. If I give a three-year-old some chocolate milk in a tall skinny glass, and I give myself a whole lot more in a short fat glass, she will tend to focus on only one of the dimensions of the glass. Since the milk in the tall skinny glass goes up much higher, she is likely to assume that there is more milk in that one than in the short fat glass, even though there is far more in the latter.
The current icon shows Polistra using a Personal Equation Machine.