Table 3.

Fuzzy membership evaluation matrix of user experience of sports smart bracelets.

First-level indicators	Second-level indicators	Comment set
		P1	P2	P3	P4	P5	P6	P7
Appearance characteristic S1	Size S11	0	0.02	0.04	0.12	0.34	0.26	0.22
	Color matching S12	0	0.02	0.04	0.16	0.3	0.24	0.24
	Modeling design S13	0.02	0.02	0.08	0.12	0.34	0.22	0.2
Interactive S2	Somatosensory inductive S21	0	0	0	0.2	0.18	0.38	0.18
	Touch interface S22	0	0.4	0.6	0.18	0.22	0.3	0.2
	Device synergy S23	0	0	0.6	0.18	0.2	0.36	0.2
Functional S3	Heart rate detection S31	0	0	0	0.2	0.24	0.34	0.22
	Detection of sleep S32	0	0	0.04	0.16	0.26	0.28	0.26
	Blood oxygen detection S33	0	0	0.04	0.22	0.24	0.32	0.18
	Motor function S34	0	0	0.02	0.14	0.32	0.24	0.28
Material S4	Material softness S41	0	0	0	0.12	0.34	0.3	0.24
	Material breathability S42	0	0.02	0.04	0.16	0.36	0.24	0.18
	Material cleanliness S43	0.02	0	0.12	0.12	0.28	0.28	0.18
Product characteristics S5	Battery endurance S51	0	0.02	0.04	0.12	0.26	0.26	0.3
	Waterproof properties S52	0	0	0.04	0.12	0.26	0.3	0.28
	Charging way S53	0.02	0	0.02	0.12	0.28	0.32	0.24

Note.P 1 is “very dissatisfied,” P 2 is “dissatisfied,” P 3 is “relatively dissatisfied,” P 4 is “uncertain,” P 5 is “relatively satisfied,” P 6 is “satisfied,” and P 7 is “very satisfied.”