Tabriz University of Medical Sciences Research and Development in Medical Education 2322-2719 11 1 2022 01 01 Edgar Dale’s Pyramid of Learning: Further expansion of the myth; Is it a mythical pyramid? 29 29 10.34172/rdme.2022.029 EN Nasim Gheshlaghi Azar Sara Shahbazi https://orcid.org/0000-0001-8397-6233 Arian Karimi Rouzbahani https://orcid.org/0000-0002-0239-503X LETTER 10.34172/rdme.2022.029 2022 12 18 2022 12 19