3/4/2010VEN125 Spring 20031Analytical Sensory EvaluationDiscrimination TestsVen 125Hildegarde HeymannWHICH SENSORY TEST TO USE?WHAT IS THE PURPOSE?This wine tastes funny...Which vineyard is higher quality...What is the threshold for….SELECT SPECIFIC SENSORY TEST(s) TO ANSWER SPECIFIC QUESTION(s)….TYPES OF SENSORY TESTSDifference TestsIs there a difference?Duo-trioTrianglePair Direction of difference……yticalRanking TestsSequence or order of the difference?Intensity Rating Tests How large is the difference?Time Intensity Tests How does it change over time? Descriptive AnalysisWhat is different and by how much?Consumer TestsHow much is it liked or preferred?AnalyConsumerTypes of Difference TestsUnspecified differenceSpecified differenceA-not-ADirectional Pair (2AFC)*Same/different3AFC*Duo-Trio Triangle 2 out of 5 (For screening only)*Rare in food/wineUnspecified differenceDuo trioWhich is same as (most similar to) “Ref”?314854REFDifference testsTriangleWhich is sample is odd?Specified difference(Rarely useful….) Directional pair testWhich is sweeter?114592673298547Unspecified differenceDuo triop = 1/2 (one tail)T iangleProbability for each test314854REFTriangleP = 1/3 (one tail)Specified difference(Directional pair test)p = 1/2 (one tail)114592673298547
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