Guttman Chart

A Guttman Chart is a type of data visualization that displays a hierarchical relationship among items or categories based on cumulative criteria. Imagine a pyramid: at the base are simpler items, and as you move up, the items become more complex or specialized. The chart shows that if someone has a certain knowledge or skill (like knowing a basic fact), they are likely to have related knowledge or skills as well. This method is useful in surveys or assessments to understand how knowledge or abilities build on each other.