marginally significantp = .065
A two-way within-subjects ANOVA on the signal changes in the superior IPS revealed a marginally significant interaction between the task (image-based, material-based, vs. color-based) and set size (2, 4, vs. 6), F (4, 68) = 2.33, p = .065, which indicated that the effect of set size was significant in the color-based change detection task, F (2, 16) = 5.17, p = .019, but not in the image-based and material-based tasks, F (2, 16) = 1.93, p = .178 and F (2, 16) = 0.15, p = .862, respectively.