📜 Theorem, law or theory

Stevens' power law

Función potencial de Stevens

Date
1957 · confidence medium
Place
Cambridge, Massachusetts, United States
Credited to
Stanley Smith Stevens
Field
Life & health

What was discovered

Empirical psychophysics law describing the power-law relationship between the intensity of a physical stimulus and the perceived magnitude of the sensation, formulated by Stanley Smith Stevens to supersede the logarithmic Weber-Fechner law.

What it led to

  • Magnitude-estimation methods in experimental psychology
  • Psychophysical scales used in acoustics and pain perception
  • Revision of the classic Weber-Fechner paradigm in psychophysics
  • Applications in interface design and sensory ergonomics
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Sources✓ verified 2026-09-28