09-04-27-10-TIandAstringency

09-04-27-10-TIandAstringency - TimeIntensityProfiling...

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A C Nobled Feb 7 2002 1 Time Intensity Profiling • Time-intensity technique monitors the intensity of sensory attributes over time. Dt t i l” dd • Data are “continuously” recorded – usually with a mouse and computer. What is TI analysis? Panelists indicate perceived intensiy of sensation associated with product over time Example Example: perceived intensity time (s) 120 400 500 600 ty APM S SUCROSE S Sucrose -------------- Aspartame ----------- Mean Sweetness Time Intensity Curves 0 100 200 300 Intensit 0 20 40 60 80 100 120 Time (Seconds) Parameters extracted from TI curves intensity A I A = Imax (Perceived maximum intensity B = Tmax (Time to maximum intensity C = Lag time (reaction time) D = Ttot (Total duration) E = Rate of increase at half maximal intensity Time Perceived B CD E F G H G+H F = Rate of decrease at half maximal intensity G = Area under curve prior to maximal intensity H = Area under curve after maximal intensity I = Tplat (Plateau time) Time of expectoration or swallowing 500 600 700 800 Judges differ due to Individual “criteria”: 0 100
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This note was uploaded on 09/29/2010 for the course VEN 91863 taught by Professor Hildergardheymann during the Spring '09 term at UC Davis.

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09-04-27-10-TIandAstringency - TimeIntensityProfiling...

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