Stanley Smith Stevens argued that it would hold only for what he called prothetic sensory continua, where change of input takes the form of increase in intensity or something obviously analogous; it would not hold for metathetic continua, where change of input produces a qualitative rather than a quantitative change of the percept.
The Difference Engine | difference | Difference Engine | Seven Hours Difference | Difference (heraldry) | The Difference Between Me and You Is That I'm Not on Fire | The Difference Between Houses and Homes | Makes No Difference | goal difference | Difference quotient | Difference list | Difference engine | Contract for difference | Against the Odds: Making a Difference in Global Health |