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. 2017 Apr 28;12(4):e0176674. doi: 10.1371/journal.pone.0176674

Table 6. Frequency of subjective measures used in the reviewed articles.

Measures References Count %
Satisfaction [52,58,66,76,144146,148,149,151154,156160] 18 58.06
Cognitive workload [52,55,58,76,143145,148,149,152154,157,163] 14 45.16
Ease of use [52,55,143147,149151,156,158,159,163] 14 45.16
Mental demand [52,55,58,76,143145,150,152,163] 10 32.26
Comfort [52,143145,149,158160,162,164] 10 32.26
Effort [52,55,58,76,143145,152,163] 9 29.03
Frustration [52,55,58,76,143145,152,163] 9 29.03
Performance [52,55,58,76,143145,152,163] 9 29.03
Physical demand [52,55,58,76,143145,152,163] 9 29.03
Temporal demand [52,55,58,76,143145,152,163] 9 29.03
Efficiency [52,58,76,143145,154,163] 8 25.81
Learnability [52,55,143145,149,151,156,163] 9 29.03
Usefulness [52,143,144,149,151,156,158,159] 8 25.81
Aesthetic [52,143145,149,162] 6 19.35
Helpfulness [52,143145,147,149] 6 19.35
Predictability [52,55,143,144,149,163] 6 19.35
Effectiveness [52,143145,149] 5 16.13
Responsiveness [52,143145,160] 5 16.13
Safety [52,143145,149] 5 16.13
Adjustment [52,143145] 4 12.90
Enjoyment [52,143,158,159] 4 12.90
Operability [55,149,162,163] 4 12.90
Physical accommodation [52,143145] 4 12.90
Reliability [52,143145] 4 12.90
Adaptability [52,143,144] 3 9.68
Complexity [55,160,163] 3 9.68
Consistency [55,149,163] 3 9.68
Exhaustion [52,143,146] 3 9.68
Expected technology benefit [52,143,144] 3 9.68
Familiarity [52,143,144] 3 9.68
Preference [58,161,162] 3 9.68
Privacy [52,143,144] 3 9.68
Security [52,143,144] 3 9.68
Willing to use [55,62,149,163] 3 9.68
Functionality [55,149,163] 2 6.45
Recommendability [158,159] 2 6.45
Attractiveness [149] 1 3.23
Clarity [146] 1 3.23
Controllability [143] 1 3.23
Mood [153] 1 3.23