No. #24

Weber–Fechner Law
- Sensory Perception's Logarithmic Scale

The Weber–Fechner law describes the logarithmic relationship between stimulus magnitude and perceived intensity. In product design, this affects how incremental changes in a product's features or services are perceived by users.

Read more on Wikipedia

Product example

Adjustments in a software's response time may need to be significant to be noticed by users, due to the logarithmic nature of sensory perception.

Empathy tips


Adjust Expectations

Ensure product changes are substantial enough to be perceived.


User Feedback on Changes

Collect user feedback to gauge the perceptibility of changes.


Incremental Improvements

Plan for incremental improvements to exceed the sensory threshold.


Sensory Testing

Conduct tests to understand the limits of sensory perception in your product's context.

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