Get access

SEQUENTIAL SENSITIVITY ANALYSIS FOR SAME–DIFFERENT TESTS: SOME FURTHER INSIGHTS

Authors


TEL: 530-756-5493; FAX: 530-752-4759; EMAIL: maomahony@ucdavis.edu

Abstract

ABSTRACT

A Sequential Sensitivity Analysis was performed for same–different tests using low-concentration threshold NaCl solutions versus purified water. The order of favorability for the sequence pairs (W-S, W-W, S-S, S-W) was different from the order obtained in previous studies (W-S, S-W, W-W, S-W). In the current study, the order depended on the judge's ability to recognize perceptual changes; this could be said to involve a decision rule or cognitive strategy that used a τ criterion. In previous studies, the orders depended on the judges’ ability to recognize individual stimuli; this could be said to involve a decision rule that used a β criterion. Further insights into the interpretation of these orders were discussed.

PRACTICAL APPLICATIONS

Sequential Sensitivity Analysis provides a simple first-order ordinal model for predicting the sensitivity of difference tests, once suitable preliminary data have been obtained. This article provides new data that allow a fuller understanding of the sensory mechanisms involved in the model, which will improve the validity of predictions being made regarding difference test sensitivity.

Get access to the full text of this article

Ancillary