Manipulation Check
One-way repeated measures analysis of variance (ANOVA) showed that choice set size had a significant effect on the perception of the number of options (F (3,81) = 27.8, p < 0.001,η 2 = 0.507, Fig 2A ). Post hoc tests suggested that the differences between the four different sizes of choice sets were all statistically significant, indicating that the manipulation of choice set size was successful (ps < 0.025).