Fig. 1

Differences between the scales Trust, Attitude, Usefulness, Intention to Use and User-Friendliness visualized. The asterisks indicate significant differences (p < 0.05; *) or highly significant differences (p < 0.001, **). The correlation coefficient specifies the magnitude of the effects, small effect: r = 0.1 to 0.3, medium effect: r = 0.3 to 0.5 and large effect: r > 0.5