Regularity ≠ symmetry: A comment on Makin, Rahman, and Bertamini (2020)
Previous studies have shown that the perceived duration of symmetrical visual patterns is longer than that of asymmetrical ones. In a different context, regular visual stimuli have been found to be judged as lasting longer than irregular ones. A recent replication study reported that the effect of symmetry on time perception might not be robust; however, the study jumbled the effects of regularity and symmetry. The stimuli used in our previous study on the effect of regularity were qualitatively and quantitatively different from those used in the study addressing symmetry. Moreover, the hypothesized underlying mechanisms involved in the effects of regularity and symmetry were completely different. Taken together, the present commentary claims that combining these findings based on the superficial similarity of these phenomena would lead to flawed scientific discussions.