Table 6.

Comparison of total steps, mistakes, and error rate.

Tasks	Original modules					Redesigned modules
	Total steps, n	Total mistakes, n	Error rate, %	Total DPa	Total steps, n		Total mistakes, n	Error rate, %	Total DP
Task 1: schedule a new medication	360	32	9.3	69	264		4	1.5	8
Task 2: modify a medication alert	192	21	10.9	41	144		2	1.4	4
Task 3: respond to a medication alert	24	0	0	0	24		0	0	0
Task 4: schedule a skin check	144	5	2.9	9	120		0	0	0
Task 5: modify skin check alert	168	6	3.1	12	120		3	2.5	5
Task 6: report new skin problem	480	13	2.6	21	312		4	1.3	8
Task 7: update the existing skin problem	264	16	5.9	36	192		3	1.6	5
Total	1632	93	5.7	188	1176		16	1.4	30

^aDP: difficulty-on-performance.