Table 4.

Results of multiple regression analysis.

Interface element (themes)	Interface element (subthemes)	Estimate	Standard deviation	Z value	P value
Intercept		−1.1114	0.6428	−1.73	.08
Education	Introduction page	0.6072	0.2469	2.46	.01
Goal setting	Default setting	−0.6647	0.2550	−2.61	.009
Goal setting	Adjusted setting	−0.0677	0.3730	−0.18	.86
Monitoring	Participation report	−0.1785	0.3697	−0.48	.63
Feedback	Default message	0.2460	0.2857	0.86	.39
Feedback	Compliment after eye resting	1.2977	0.3443	3.77	<.001
Information delivery	Health information	−0.6490	0.2824	−2.30	.02
Notification	Large-size window	−0.2572	0.3571	−0.72	.47
Notification	Mid-size window	−0.8873	0.3766	−2.36	.02
Notification	Small-size window	−0.6731	0.3798	−1.77	.08
Medium	Sound	0.2580	0.2297	1.12	.26
Aesthetic	Expert agent	−0.1277	0.3529	−0.36	.72
Aesthetic	Robot agent	−0.1270	0.3437	−0.37	.71
Aesthetic	Symptom-like effects with a notification window	0.7817	0.2714	2.88	.004