Table 1.

Key usability metrics used for the literature review and their maximum assigned weighted scores along with the 5-point rating system.

Key usability metric	Maximum weighted score	5-point individual usability rating for all metrics
Effectiveness	20	Excellent=5 points; Good=4 points; Fair=3 points; Poor=2 points; Bad=1 point
Efficiency	20	Excellent=5 points; Good=4 points; Fair=3 points; Poor=2 points; Bad=1 point
Ease of learning	20	Excellent=5 points; Good=4 points; Fair=3 points; Poor=2 points; Bad=1 point
User satisfaction	20	Excellent=5 points; Good=4 points; Fair=3 points; Poor=2 points; Bad=1 point
Cognitive load	20	Excellent=5 points; Good=4 points; Fair=3 points; Poor=2 points; Bad=1 point
Total	100	—a

^aNot applicable.