Statistical analysis used a paired, two-tailed, non-parametric Wilcoxon signed-rank test. For Experiment AIIE2 (with half the number of participants of Experiment AIIE1) the responses averaged across all 5 questions were larger (Z = 2.1, p = .03) for foreground occlusion (M = 4.3, SD = .93) than for non-foreground occlusion (M = 3.4, SD = .93).