TABLE 3.

Question items in the experiment. From Question ID(QID) 1 to QID7 are measured on a 1 to 7 Likert scale (Higher values indicate affirmation and lower values indicate negation). QID8 is answered with 3 choices (Autonomous system operates in real-time, Don’t know, Human operates in real-time). Open-ended responses are provided for QID9 and QID10.

QID	Content	Category
1	Do you find the salesclerk’s utterances to be likable?	Likeability
2	Do you find the salesclerk who is making the utterances to be trustworthy?	Trustworthness
3	Based on the salesclerk’s utterances, do you think the salesclerk can understand the customer’s thoughts?	Tailoring effect
4	Based on the salesclerk’s utterances, do you think the salesclerk is trying to tailor the dialogue to the customer?
5	Do you find the salesclerk’s utterances to be human-like?	Human-likeness
6	If the salesclerk was a human, do you think the salesclerk would make these utterances?
7	If the salesclerk was a robot, do you think the salesclerk would make these utterances?	Robot-likeness
8	Based on the salesclerk’s utterances, who do you think is operating the salesclerk?	Customer’s perceptions
9	Please explain why you chose your answer for Question ID8.
10	If you felt anything was unnatural in the salesclerk’s utterances, please describe them.	-