Abstract: d' is an estimate of delta, a measure of the degree of sensory difference between two products, that can be obtained easily using tables, from the proportion of difference tests performed correctly. Tables of delta are available for the 2-AFC, 3-AFC, triangular and duo-trio tests. Tables for calculating the variance of d' for...
Abstract: The Thurstonian prediction that judges will get a higher proportion of correct 3-AFC tests than triangle tests was confirmed using a yogurt system. As predicted, d‘ values for the triangle and 3-AFC tests corresponded. Sequential Sensitivity Analysis predictions for the sensitivity of various tasting sequences were confirmed for the 3-AFC test but not...
Abstract: The purpose of this paper is to provide a general theoretical framework for the effect of multicomponent mixtures on biological systems when the components of these mixtures produce similar types of effects such as cardiac stimulation, sweet taste or a particular odor quality. These systems are assumed to involve receptor and, possibly, transducer...
Abstract: Sequential effects and positional response bias are accounted for in new models for triadic choice. These models were applied to data on distilled water and dilute NaCl solutions by use of the triangular and 3-alternative forced-choice methods with 4 participants. The concept of a "conditional stimulus" is introduced to describe stimuli that are...
Abstract: Aqueous nonionic (o.3% w/v) and ionic (0.1% and 0.3% w/v) gun systems containing NaCl, or equal weights of NaCl plus KCl, or NaCl plus CaCl2 were examined. At equivalent molar concentrations of added ions, 23Na NMR transverse relaxation rates (R27 sec-1) showed an increase in average Na- mobility with the addition of K-...
Abstract: A model for preferential and triadic choice is derived in terms of weighted sums of central F distribution functions. This model is a probabilistic generalization of Coombs’ (1964) unfolding model and special cases, such as the model of Zinnes and Griggs (1974), can be derived easily from it. This new form extends previous...
Abstract: Earlier data showed that subjects presented with two samples of distilled water and one of tap water were significantly more consistent in choosing the tap water as preferred than in identifying it as the odd sample in the set. The results were sometimes interpreted as demonstrating greater sensitivity for hedonic judgments than for...
Abstract: The effect of cognitive search strategies and variations in the oral environment on discrimination test performance were investigated. Subjects were required to discriminate between low concentration NaCl solutions and water using the 3-AFC and triangle test protocols. As predicted by Thurstonian modeling, subjects obtained a higher proportion of correct tests for the 3-AFC...