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Table 3 Mean and Standard Deviation of the severity scores of identified problems per method and usability attribute

From: A combination of two methods for evaluating the usability of a hospital information system

 

Heuristic evaluation, Mean ± SD

Think aloud,

Mean ± SD

Think aloud + Heuristic evaluation,

Mean ± SD

Both Think aloud and Heuristic evaluation,

Mean ± SD

Only Think aloud,

Mean ± SD

Only Heuristic evaluation,

Mean ± SD

Satisfaction

3.17 ± 3.02

3.29 ± 0.36

3.22 ± 2.41

4.21 ± 4.83

3.29 ± 0.36

2.59 ± 0.65

Effectiveness

3.47 ± 0.59

3.65 ± 0.41

3.53 ± 0.55

3.79 ± 0.32

3.65 ± 0.46

2.85 ± 0.49

Efficiency

3.58 ± 0.66

3.31 ± 0.35

3.41 ± 0.5

3.96 ± 0.1

3.31 ± 0.35

2.92 ± 0.71

Learnability

3.05 ± 0.66

3.23 ± 0.21

3.1 ± 0.57

3.53 ± 0.59

3.23 ± 0.21

2.86 ± 0.59

Error

3 ± 0.67

3.22 ± 0.38

3.06 ± 0.61

3.55 ± 0.49

3.22 ± 0.38

2.67 ± 0.54

severity rating of

Total

3.25 ± 0.25

3.34 ± 0.17

3.26 ± 1.67