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Table 1 Subjective usability survey assessing the ease of use, naturalness, fatigue, speed, and simple preference

From: IoT + AR: pervasive and augmented environments for “Digi-log” shopping experience

Category

Question

Answered after experiencing two conditions [(a) conventional switchable interface and GUI-based button interface and (b) IoT + AR interface]

Q1:

Easy-to-use

How accessible did you find the interface to be?

(1: very difficult – 7: very easy)

Q2:

Naturalness

How intuitive and natural did you find the interface to be?

(1: very contrived – 7: very natural)

Q3:

Fatigue

How fatigued were you after using the interface?

(1: very fatigued – 7: not fatigued at all)

Q4:

Speed

How fast did you feel you were able to complete the task?

(1: very slowly – 7: very fast)

Q5:

Preference

Which interface do you prefer?