. Author manuscript; available in PMC: 2016 Jan 12.

Published in final edited form as: Hum Factors. 2014 Sep 5;57(3):491–506. doi: 10.1177/0018720814549238

TABLE 6.

Mean Task Performance by Task Function

Task Function	System A	System B	System C	Significance
Finding health information (0–4)	3.72 (0.45)	2.57 (1.06)	2.80 (1.47)	A > B^* A > C^*
Medication management (0–4)	3.63 (0.62)	3.19 (0.62)	—	A > B^***
Lab/test results (0–7)	6.46 (1.16)	5.87 (1.33)	5.19 (1.83)	A > B^ A > C^* B > C^**
Health promotion/disease prevention (0–4)	0.83 (1.50)	2.43 (1.80)	2.91 (1.38)	B > A^* C > A^*
Communication/appointment setting (0–4)	3.17 (1.10)	2.98 (1.20)	—
Total score (System A, 0–35; System B, 0–23; System C, 0–18)	20.87 (4.14)	16.89 (4.09)	12.33 (3.72)

Note. Standard deviations shown in parentheses.

^**

p < .01.

^***

p < .001.