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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?