Holtrop, Geertjan https://orcid.org/0009-0002-5734-9441
Article History
Received: 4 June 2025
Accepted: 28 April 2026
First Online: 18 May 2026
Declarations
: Permissions for the use of Fig. Müller-Lyer Illusion was granted by Fibonacci under license CC BY-SA 3.0.
: The author has no competing interests to declare that are relevant to the content of this article.
: Ethical approval was not sought for the present study because it is a theoretical study that does not involve humanparticipants, animal subjects, or sensitive personal data.