Technical Report: Just About Right Scales

ABSTRACT
When Goldilocks considered eating the bears’ porridge, she found one "too hot", one "too cold", and one "just right". It is not possible to know from this information whether Goldilocks perceived the porridges to be hot or cold in intensity; we just have relative information about the three porridges. Relative ratings such as just-about-right (JAR), ratings relative to a reference, and ratings of one product relative to another all share a common model. The purpose of this report is to discuss this model and explain how it can be used to interpret just-about-right ratings.

  This technical report appears as: Ennis, D. M. (2003). Just About Right Scales. IFPress, 6(3) 2-3.

Download the entire technical report here:

Just About Right Scales

This technical report also appears in our book, Short Stories in Sensory and Consumer Science.

Tags: Consumer Testing, Difference/Discrimination Testing, Just About Right Scales, Thurstonian Tools