Difference tests
FIZZ computes the following tests:
  • Triangle test
  • Paired tests (one- and two-tailed)
  • Duo-Trio test
  • 2 out of 5 test
  • A - not A trials

The software computes Type I risks (α risk) to test the difference between products. It allows also, for most of the tests, the computation of the Type II risk (β risk) to test the similarity between products.

You may also define specific tests.

Most of the tests may be extended. For example you could have asked the panelist to score the intensity of the perceived difference or to describe the difference using multiple-choice questions. In all cases, the software computes the answers obtained only for the tasters who have answered right to the difference test itself.