Fig. 2From: The hazards of perception: evaluating a change blindness demonstration within a real-world driver education courseAverage ratings from the pre-demonstration and post-demonstration questionnaires of Experiment 1. For the “ease to spot changes” question, the rating scale ranged from 1 (very difficult) to 5 (very easy). For the other questions, the rating scales ranged from 1 (not at all confident/concerned) to 7 (totally confident/concerned). Significant difference: **p < 0.01. Error bars represent the standard error. See Additional file 1 for the full questionsBack to article page