Skip to main content

Table 4 Results of non-parametric median test comparing user perceptions by version tested

From: Key changes to improve social presence of a virtual health assistant promoting colorectal cancer screening informed by a technology acceptance model

Parameter Median (Q1, Q2) Statistics N
Version 1 Version 2 Version 3 H (a) P value
The virtual human looked like a doctor 2 (2,4) 2.5 (1.3,4) 2 (2,2.5) 2.057 0.358 39
There was too much inconsistency in this application 4 (4,4) 4 (1.75, 4) 4 (4,5) 4.150 0.126 39
The application was easy to use 2 (1,2) 1.5 (1,2) 2 (1,2) 1.660 0.435 39
The virtual human looked very realistic 2 (2,4) 3 (2,4) 2 (2,3) 0.503 0.778 33
The virtual human had a pleasing voice 2 (2,2) 2 (2,2) 2 (1,2) 3.097 0.213 32
The virtual human's gestures distracted me as I tried to listen (reverse scored) 2 (1,2) 3.5 (2,4) 2 (1.5,2) 12.102 0.002* 40
The virtual human's gestures distracted me as I tried to listen 4 (4,5) 2.5 (2,4) 4 (4,4.5) 0.623 0.732 40
The virtual human looked trustworthy 2 (2,3) 2 (2,3) 2 (2,2) 2.665 0.264 41
The virtual human looked like an expert 3 (2,3) 3 (2,3) 2 (1.5,2) 6.078 0.048* 39
  1. *Statistical difference detected between groups (p < .05) with sig. values adjusted by Bonferroni for multiple tests; (a) the test statistic adjusted for ties. 1 = strongly agree and 5 = strongly disagree