Reconstruction, validation, and standardization of the extended objective Measure of Ego Identity Status-2 (EOM-EIS-2) and preparing its short form in Iranian society

Introduction: An appropriate tool for measuring personal identity has already been developed by Adams et al but, it is not yet clear to what extent this tool and its items are in line with the requirements of Iranian culture. Aim: This study aimed to reconstruct, validation and standardization of the extended objective measure of ego Identity Status-2 (EOM-EIS-2) and preparing its short form in Iranian society. Method: The study population consisted of 524 students of Tehran state-run universities and was selected by cluster random sampling method. Item analysis such as item discrimination and loop, construct validation (factor analysis) and reliability analysis (Cronbach Alpha) were utilized. Results: During the factor analysis, 8 factors were identified, 6 of which were consistent with the concepts of Identity status. Reliability assessment by computing Cronbach's alpha coefficient for each of the 4 Identity statuses and for the instrument were above 0.7 and 0.886 respectively. During the validation process, 15 questions were removed due to the reduction of validity evidence. Finally, taking into 6 omitted questions during the reliability analysis process (due to the reduction of reliability evidence); the number of omitted questions reached 21 and a shortened Iranian questionnaire with 43 items was prepared and presented. Conclusion: It can be concluded Persian version of Measure of Ego Identity Status-2 (EOM-EIS-2) in Iranian culture possesses an appropriate validity and reliability. Also, the factors obtained from the factor analysis and the short form presented can adequately measure the Identity statuses.