摘要：AbstractIntroduction: Having three sub scales, the Ontological identity scale (OIS) was designed based on Erikson's opinion about Universalist – Humanist identity, teachings of eastern and western philosophers and Islamic figures on the issue of ontology.Purpose: The present study aims to investigate the development and validation of Ontological identity questionnaire.Method: 230 individuals with the age average of 22 years old were randomly chosen for the sample of the study.Results: The exploratory factor analysis revealed that this scale has 3 components. The total Cronbach's alphas coefficient of this scale was calculated 0.81.Also, a positive and significant correlation coefficient was found between OIS and PIL scales which in turn validated the validityof the measurement scale.Conclusion: thus OIS scale is a useful scale for Ontological identity evaluation.
