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Lessons Learned in Assessing Human-Virtual Human Interaction

To avoid the “file drawer effect” of unreported null results, we report on an experimental study in assessing humanvirtual human interaction. In this study, participants were asked to spend about ten minutes with a projected lifesized virtual human. The virtual human interacted with the participants by speaking to them and exhibited three different tones of voice and facial expressions corresponding to a happy, sleepy, or grumpy personality. The virtual human asked participants to help her with a visual memory task where they responded, via keyboard, to a series of question sets about various pictures. We hypothesized that the virtual human’s personality will have an effect on the amount of time participants are willing to help the virtual human on a task. In the results of our preliminary experiment, the personality of the virtual human had no effect on interaction time. First, we summarize the study and results, next we discuss some of the probable causes of our results, and finally we outline the lessons learned.