This article provides an overview of the four major psychological approaches used in the study of religious change. A heuristic stage model of conversion consisting of seven stages: context, crisis, quest, encounter, interaction, commitment, and consequences (Rambo 1995) serves as a framework for integrating the research of these four approaches, providing a fuller understanding of the ... [Show full abstract] multilayered processes involved in conversion. The authors hope that the phenomenon of spiritual transformation and conversion will continue to draw the attention of psychologists who increasingly appreciate the complexity and dynamism of religious/spiritual transformation. For the psychology of religion in general and the psychology of conversion and spiritual transformation in particular to be viable and valuable, psychologists will need to join with researchers in the human sciences and religious studies to develop methods and theories worthy of this complex subject. Additionally, through collaboration with psychologists in the People’s Republic of China, the authors look forward to exploring together the fascinating and important issues that emerge as we seek to understand the nature of conversion and spiritual transformation in China.