highly significantp < 0.001
Further, all 2-way interactions were highly significant [Opacity × Orientation: F 1,297 = 40.2, p < 0.001, η p = 0.12; Stimulus × Opacity: F 1,297 = 68.2, p < 0.001, η p = 0.19; Stimulus × Orientation: F 1,297 = 896.3, p < 0.001, η p = 0.75], and also the Stimulus × Opacity × Orientation interaction was significant [ F 1,297 = 7.9, p < 0.01, η p = 0.03].