Once a threshold is crossed, further gains stop registering in the measurement

Evidence

As the use of a poverty line illustrates, for many concepts, indicators, and global indices there are thresholds above which increased values have little or no impact on the final evaluation. This is seen in figure 4.4 by the fact that once above the poverty line, the country or individual has value 0.0 on the poverty concept. — Gary Goertz, Social Science Concepts and Measurement, 663

Categorization

• DEFINE: Instantiation of the Principle of Unimportant Variation—regions of an indicator where variation is semantically inert.