Table 1.

Demographics of participants.

Label	Sex	Age (years)	Years of experiencea	Technical proficiencyb	Used smart speaker
OA1c	Female	72	2	Intermediate	Brand A
OA2	Female	66	0.5	Intermediate	Brand A
OA3	Female	69	1	Novice	Brand A
OA4	Female	71	1	Novice	Brand A
OA5	Male	73	3	Novice	Brand B
OA6	Male	67	2.5	Novice	Brand B
OA7	Male	68	0.5	Intermediate	Brand A
OA8	Female	61	0.5	Novice	Brand B
OA9	Female	73	2	Intermediate	Brand A
OA10	Female	66	2	Novice	Brand A
OA11	Male	77	1.5	Intermediate	Brand B
OA12	Female	65	2	Novice	Brand B
OA13	Male	73	1.5	Intermediate	Brand B
OA14	Female	64	1	Novice	Brand A
OA15	Female	73	1.5	Novice	Brand A
OA16	Male	73	1	Intermediate	Brand B
OA17	Male	62	0.5	Intermediate	Brand B
OA18	Male	64	1	Novice	Brand B
OA19	Female	69	2	Novice	Brand A
OA20	Female	70	1.5	Intermediate	Brand B

^aThe actual time that the participant starts to use the smart speaker regularly (self-reported).

^bIndividuals’ ability to discern the usefulness of a smart speaker and their comfort in using it for various purposes (evaluated by the Artificial Intelligence Literacy Questionnaire proposed in [33], Multimedia Appendix 1).

^cOA: older adult.