Fig. 2

Overview of design changes. (1) Selected example of print stimulus presented to participants on printed sheets of paper in early data collection sessions. (2) Screen shots from the animated and interactive versions of the virtual health assistant (VHA) delivering colorectal cancer screening messages. These interactive versions were tested on mobile phones. Images show design changes across the three interactive versions. Interactive version 1 eliminated an introduction showing a closed door and the VHA opening to greet user, then walking back to her chair (image 2). Interactive versions 2 and 3 (images 3 and 4) show updates to the clinic room environment, attire, and appearance among other updates detailed in Table 3