. 2019 Jul 5;8(7):243. doi: 10.3390/foods8070243

Table 5.

Mean values for unconscious responses of chocolate samples.

Sample	FaceReader™ emotions
Sample	Happy ^NS	Sad ^NS	Angry ^NS	Surprised ^NS	Scared ^NS	Disgusted ^NS	Contempt ^NS	Neutral ^NS
Bitter	0.03 ± 0.04	0.10 ± 0.09	0.27 ± 0.23	0.18 ± 0.18	0.05 ± 0.10	0.02 ± 0.04	0.07 ± 0.05	0.30 ± 0.10
Salty	0.04 ± 0.09	0.14 ± 0.17	0.28 ± 0.23	0.19 ± 0.19	0.05 ± 0.10	0.04 ± 0.04	0.06 ± 0.05	0.26 ± 0.10
Sour	0.04 ± 0.08	0.12 ± 0.14	0.26 ± 0.22	0.18 ± 0.19	0.05 ± 0.09	0.02 ± 0.09	0.08 ± 0.07	0.30 ± 0.14
Sweet	0.05 ± 0.10	0.12 ± 0.14	0.26 ± 0.24	0.20 ± 0.20	0.03 ± 0.06	0.03 ± 0.06	0.08 ± 0.06	0.29 ± 0.12
Umami	0.03 ± 0.06	0.11 ± 0.12	0.29 ± 0.25	0.17 ± 0.14	0.06 ± 0.09	0.28 ± 0.04	0.06 ± 0.04	0.28 ± 0.10
Sample	FaceReader™ dimensions		Biometrics		Head orientations
Sample	Valence ^NS	Arousal ^NS	Heart rate (BPM) ^NS	Skin temperature (°C) ^NS	X–Head orientation	Y–Head orientation	Z–Head orientation
Bitter	−0.35 ± 0.19	0.34 ± 0.12	69.19 ± 18.36	34.97 ± 36.65	−1.56 ± 0.31 ^d	6.49 ± 0.71 ^b	0.38 ± 0.31 ^b
Salty	−0.38 ± 0.24	0.32 ± 0.10	70.94 ± 6.65	35.83 ± 37.30	−0.39 ± 0.26 ^c	2.03 ± 0.77 ^c	1.45 ± 0.32 ^a
Sour	−0.34 ± 0.24	0.34 ± 0.10	69.95 ± 10.48	35.70 ± 36.90	3.19 ± 0.48 ^a	22.64 ± 0.59 ^a	−1.10 ± 0.45 ^c
Sweet	−0.33 ± 0.24	0.45 ± 0.12	73.14 ± 11.03	35.77 ± 37.32	−1.66 ± 0.21 ^d	2.70 ± 0.22 ^c	−0.56 ± 0.16 ^c
Umami	−0.37 ± 0.21	0.46 ± 0.10	71.17 ± 9.02	35.24 ± 1.72	0.19 ± 0.09 ^b	7.64 ± 0.26 ^b	−3.54 ± 0.21 ^d

^a–d Means with different letters for each parameter indicate significant differences (p < 0.05) by the Tukey’s Studentized Range (HSD) test. NS = no significant difference (p ≥ 0.05) from the Tukey’s Studentized Range (HSD) test.