TY - JOUR
T1 - Novel modelling approaches to characterize and quantify carryover effects on sensory acceptability
AU - Torrico, Damir Dennis
AU - Jirangrat, Wannita
AU - Wang, Jing
AU - Chompreeda, Penkwan
AU - Sriwattana, Sujinda
AU - Prinyawiwatkul, Witoon
N1 - Funding: This research was funded partially by the 2017 Early Career Researcher Grant Scheme from the University of Melbourne, Australia (603403) and the USDA NIFA Hatch project LAB94291, Louisiana State University Agricultural Center.
PY - 2018/11
Y1 - 2018/11
N2 - Sensory biases caused by the residual sensations of previously served samples are known as carryover effects (COE). Contrast and convergence effects are the two possible outcomes of carryover. COE can lead to misinterpretations of acceptability, due to the presence of intrinsic psychological/physiological biases. COE on sensory acceptability (hedonic liking) were characterized and quantified using mixed and nonlinear models. N = 540 subjects evaluated grape juice samples of different acceptability qualities (A = good, B = medium, C = poor) for the liking of color (C), taste (T), and overall (OL). Three models were used to quantify COE: (1) COE as an interaction effect; (2) COE as a residual effect; (3) COE proportional to the treatment effect. For (1), COE was stronger for C than T and OL, although COE was minimal. For (2), C showed higher estimates (−0.15 to +0.10) of COE than did T and OL (−0.09 to +0.07). COE mainly took the form of convergence. For (3), the absolute proportionality parameter estimate (λ) was higher for C than for T and OL (−0.155 vs. −0.004 to −0.039), which represented −15.46% of its direct treatment effect. Model (3) showed a significant COE for C. COE cannot be ignored as they may lead to the misinterpretation of sensory acceptability results.
AB - Sensory biases caused by the residual sensations of previously served samples are known as carryover effects (COE). Contrast and convergence effects are the two possible outcomes of carryover. COE can lead to misinterpretations of acceptability, due to the presence of intrinsic psychological/physiological biases. COE on sensory acceptability (hedonic liking) were characterized and quantified using mixed and nonlinear models. N = 540 subjects evaluated grape juice samples of different acceptability qualities (A = good, B = medium, C = poor) for the liking of color (C), taste (T), and overall (OL). Three models were used to quantify COE: (1) COE as an interaction effect; (2) COE as a residual effect; (3) COE proportional to the treatment effect. For (1), COE was stronger for C than T and OL, although COE was minimal. For (2), C showed higher estimates (−0.15 to +0.10) of COE than did T and OL (−0.09 to +0.07). COE mainly took the form of convergence. For (3), the absolute proportionality parameter estimate (λ) was higher for C than for T and OL (−0.155 vs. −0.004 to −0.039), which represented −15.46% of its direct treatment effect. Model (3) showed a significant COE for C. COE cannot be ignored as they may lead to the misinterpretation of sensory acceptability results.
KW - Carryover effects
KW - Mixed models
KW - Nonlinear models
KW - Sensory acceptability
KW - Sensory bias
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U2 - 10.3390/foods7110186
DO - 10.3390/foods7110186
M3 - Article
AN - SCOPUS:85063302619
SN - 2304-8158
VL - 7
JO - Foods
JF - Foods
IS - 11
M1 - 186
ER -