Table 3.
Correlation coefficient (r) between appearance acceptability or overall acceptability and physicochemical characteristics, sensory characteristics, purchase intent and willingness to pay for apple

Appearance acceptability Overall acceptability
Physicochemical characteristics
Volume 0.727 0.110
Weigh 0.734 0.123
Specific volume 0.455 0.165
pH -0.038 -0.730
Acidity 0.202 0.597
Brix -0.034 0.624
Hardness (Flesh,Top) 0.317 0.784
L (Skin,Top) -0.555 0.646
a (Skin,Top) 0.456 -0.555
b (Skin,Top) -0.351 0.794
L (Flesh, Top) -0.299 -0.524
a (Flesh,Top) -0.088 0.564
b (Flesh,Top) -0.003 0.737
Sensory characteristics by consumer
Size 0.722 0.014
Redness 0.730 -0.164
Glossiness 0.797 0.130
Surface roughness -0.335 -0.316
Apple odor 0.381 0.279
Apple flavor 0.129 0.984
Sweetness 0.299 0.761
Sourness -0.271 0.621
Hardness -0.234 0.814
Crunchiness -0.182 0.860
Juiciness 0.343 0.771
Toughness during mastication -0.187 0.843
Purchase intent (by appearance of whole apple under light box) 0.968 0.185
Willingness to pay 0.934 -0.023
Purchase intent (by uniform size of apple sample without skin) 0.180 0.934
Willingness to pay 0.082 0.986