So sánh năng lực của phép thử tam giác và tetrad trên một số loại rượu

KHOA TAM GIÁC TETRAD U Chuyên ngành: 605402 , 22 Tp HCM KHOA MV MSHV: 12113002 Tam giác Tetrad - Tam giác Tetrad Tôi i rong nghiên c c c a phép th Tam giác phép th Tetrad u có n c nl c so sánh ba lo i t 50%, 40% 30% (v/v); kh o sát t i nhi u m khác bi t ( ) khác thông qua vi c so sánh t l câu tr l Phép th Tam giác Tetrad ) c ti n hành m t h ng ( N an h gi s c a bi P c phép th Tam giác Tetrad c phân tích thơng qua h Phép th " mơ hình K t qu c t thí nghi m cho th y: Giá tr thí nghi m khơng khác bi t có ý c a hai phép th ), n Tetrad giác Tam 1%, 39.3% 84 50%, 40% 30% Bên c bi n kh o sát ( ct n ph t qu cịn cho th y khơng có s c n a hai ) giác Tam Tetrad Tetrad 7% 88 Tam giác Tetrad 40% Tam giác Tetrad ii ABSTRACT The power of a sensory discrimination test is the capacity of that test to reliably detect differences between products Consideration of power is important as it helps researchers to choose which discriminative tests are applied in some specific cases In this study, the power of Triangle test and Tetrad test were compared by comparing their correct response probabilities ( ) in case of three types of spirits with 50%, 40% and 30% (v/v) alcohol; each of product, some values (effect size) were concerned The discrimination tests, Triangle and Tetrad, were performed by a same panel ( ) between a basic spirit and the same spirit with added citric acid Each of product: Different amounts of citric acid were added to get some values from 1.5 to 3; Logistic regression model was applied to predict correct response probability from acid concentration protocol Tetrad s power was analysed through - protocol variable in model Results of experiments showed that there was no significant difference between Tetrad s values ( ), in other word, the power of two tests were not significantly different However, by using logistic regression analysis, we found that the chance of Tetrad test being more powerful than Triangle test were 11.1%, 39.3%, 84.2% when they were applied in case of spirits with 50%, 40% and 30% alcohol, respectively Besides, the interactio concentration protocol In summary, with acid ( ) value ranged from 1.5 to 3: In case of spirit with 30% alcohol, applying the triangle protocol would have 84.2% chance to obtain the result less committing type II error than Triangle The manufacturers should switch from Triangle test to Tetrad test for this product category due to the increased reliability onformation In case of spirits with 40% and 50% alcohol, we had 60.7% and 88.9% Tetrad s, respectively Therefore, Triangle test should be the standard test for product with 40% v/v or higher alcohol due to the smaller sample amount we used, but the equivalent or greater power we gained iii , n c gian hai Quang ên Minh iv 1 1.1 1.2 1.2.1 1.2.2 .5 1.2.3 1.2.4 1.3 .10 1.3.1 .10 1.3.2 10 1.3.3 14 1.3.4 .16 1.4 1.4.1 1.4.2 17 ên 17 So sánh d a .17 18 2.1 18 2.2 20 2.3 20 2.3.1 .21 2.3.2 22 2.4 22 2.4.1 22 2.4.2 2.5 23 23 2.5.1 23 2.5.2 24 2.5.3 tin c y c a k t lu n .25 2.5.4 tin c y c a k t lu n 25 26 v 3.1 26 3.2 28 3.2.1 28 3.2.2 31 3.2.3 39 47 .49 50 53 53 trad 54 Tính 55 61 67 vi H thích 11 12 12 cách 13 16 18 19 -AFC 26 Hình 3.2 -AFC) 27 29 th boxplot giá tr 32 th boxplot giá tr 32 th boxplot giá tr 33 Hình 3.7 Phân Hình 3.8 S 33 m nh n d n 34 Hình 3.9 Giá tr 35 Hình 3.10 Giá tr 35 36 38 41 43 44 c a bi mơ hình h i quy c a u ch a 50%, 40% 30% c n 45 53 : Tam giác Ngày: 54 : Tetrad cho n Ngày: Nhóm 1: Nhóm 2: 55 : Tính cho ph Tam giác Tetrad 56 57 58 59 60 61 : Bàu Mơ hình 62 Mơ hình 63 Bàu Mơ hình 64 Mơ hình 65 30% Mơ hình 66 Mơ hình 67 H TRÍCH NGANG - 2007-2011: n Chun ngành Cơng n p Tp.HCM p - 2012-2014: Chuyên ngành Công n Q TRÌNH CƠNG TÁC - 2011- - p u ... , Phép Tam giác Tetrad [4] Tam giác, phép th Tetrad Tam giác [5-7] Tam giác Tetrad Tam giác sang Tetrad , ph cao Tetrad Tam giác [7] Tetrad [8], mà [5] Tetrad Tam giác [7] Tam giác Tetrad Tetrad... 10 1.3 Tam giác Tetrad 1.3.1 Tam giác, có [14] Tam giác khác Tam giác Tam giác [3] Tetrad [6] Tetrad [15] [14] Tetrad Tetrad Tetrad không [15] Tam giác, Tetrad Tetrad không Tetrad Tam giác 1.3.2... [18] Tam giác Tetrad so sánh (Hình 1.2) Tam giác [11] 12 Hình 1.2 Tam giác [18] Tam giác Tetrad a) Tam giác Tam giác Hình 1.3 Tam giác [17] 13 giá tr trung bình khác ( Hình 1.3 b) Tetrad Tetrad