Mohammad Khodayarifard, Ph.D. (1999), University of Wollongong, is Professor of Clinical Child Psychology at the University of Tehran. He has published several books and articles on psychology of religion and spirituality, including “Abrahamic Religiosity Scale: development and initial validation”,Mental Health, Religion and Culture, (2018).Masud Azarbaijani, Ph.D. (2006), University of Qom, is Professor of Philosophy of Religion at the Research Institute of Hawzeh and University. He has published ca. 15 books and 50 scientific articles on psychology of religion, including Psychology in Nahj al-Balagha (2019).Rouhollah Shahabi, Ph.D. (2013), University of Tehran, is Assistant Professor of Educational Psychology at the Tehran Institute of Humanities and Cultural Studies. His research interests lie in cultural psychology. He has published a number of papers on religiosity and the relationship between religiosity and psychological factors.Saeid Zandi, Ph.D. (ABD), Allameh Tabatabaʿi University, is a research assistant at that university. His main interests lie in the fields of cultural psychology, positive psychology and cross-cultural research. He has also published articles on psychology of religion and religious psychology.