Exponential Growth Bias (Failure to Grasp)

A tendency to underestimate compounding or extrapolate proportional change too much like linear change.

Exponential growth bias is a tendency to underestimate compounding or to interpret a proportional growth process too much like an additive one. It has been studied in numerical judgments, financial reasoning, and graph extrapolation. Its size depends on the person, task, representation, and available information.

The practical response is to compare intuition with an explicit calculation and to check the growth assumptions separately. Research does not establish that everyone’s intuition is always wrong or incapable of improving. Graph scales and numerical framing can help particular tasks while making others harder; a logarithmic display should clearly communicate that equal visual steps represent ratios rather than equal additions.

When to use it

Useful when interpreting compound growth, future quantities, or graphs of proportional change.

How it can help

Compare an intuitive estimate with calculated checkpoints and inspect the assumptions behind the calculation.