Table 1.

Participants’ response to question “Did you complete the hallway task following your initial preference? Justify your answer”.

	Justification	Example quote
J1	Expectation on robot behavior	“I knew that the robot would change if I stood my ground.”
J2	Simplicity	“I thought it would be easier that I switched.”
J3	Task-specific factors	“I was on the correct side (you should walk on the right hand side).”
J4	Robot behavior	“HERB decided to go the same way as I did.”
J5	Task completion	“To finish the task in the other end of the hall.”
J6	Other	“I tend to stick with my initial choices.”