from The Century Dictionary.
- In experimental psychology, a set of cylinders, of like appearance but different weight, used for the determination of the differential sensitivity (passive pressure or lift).
Sorry, no etymologies found.
A sufficient number of test-weights must be used, or trials made, to eliminate the influence of chance.
I use test-weights that mount in a series of "just perceptible differences" to an imaginary person of extreme delicacy of perception, their values being calculated according to Weber's law.
In other words, he would never be likely to put one of the test-weights more than one step out of its proper place.
It will be noted that the conversion of results obtained by the use of one series of test-weights into what would have been given by another series, is a piece of simple arithmetic, the fact ultimately obtained by any apparatus of this kind being the "just distinguishable" fraction of real weight.