Studying the influence of package shape and colour on consumer expectations of milk desserts using word association and conjoint analysis

Designing consumer trials balanced for first and higher orders of carry-over effect when only a subset of k samples from t may be tested

Impact of the information provided to consumers on their willingness to pay for Champagne: comparison with hedonic scores

Consumer preferences for fresh and aged apples: a cross-cultural comparison

Which juice is 'healthier'? A consumer study of probiotic non-dairy juice drinks

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The problem of balancing out the effect of order of presentation and the carryover effect of a preceding sample over a series of presentations of the same set of samples is addressed. A series of designs developed by Williams (1949) are used. The method of calculation is given. Tables containing about 50 consumers of each design for presenting from 4 through to 16 samples are given.

Designs to balance the effect of order of presentation and first-order carry-over effects in hall tests

Comparison of canonical variates analysis with target rotation and least squares regression as applied to pyrolysis mass spectra of simple biochemical mixtures

Feedback in sensory training can facilitate performance in several ways. It can provide information about the type, the extent and the direction of errors so that they may be corrected. This paper shows the effects of immediate feedback over a three session training. Triangle test, familiar odor recognition and scaling test were used in training. The scaling test, specially designed for this study, was performed with solutions of mixtures of basic tastes in different proportions.



Prior sensory ability was taken into account by dividing 54 people into two groups according to their sensory ability. Each group was then split into an experimental group receiving feedback and into a control group.



The results showed that feedback has different effects depending on test: a positive effect for recognition test, no effect for triangle test and a probable negative effect for scaling.

Lloyd V. Vallis

Papers

Designs to balance the effect of order of presentation and first-order carry-over effects in hall tests

Comparison of canonical variates analysis with target rotation and least squares regression as applied to pyrolysis mass spectra of simple biochemical mixtures

Effect of feedback on sensory training: A preliminary study