en Clinical Reasoning Original Research Original Research <strong>Background: </strong>Clinical reasoning plays an important role in the accurate diagnosis and treatment of diseases. Script Concordance test (SCT) is one of the tools that assess clinical reasoning skill. This study was conducted to determine the reliability and concurrent and predictive validity of SCT in assessing final lessons and gynecology exams of undergraduate midwifery students.<br> <strong>&nbsp;&nbsp; Methods:</strong> At first, 20 clinical scenarios followed by 3 questions were designed by 2 experienced midwives. Then, after examining the content validity, 15 scenarios were selected. The test was used for 55 midwifery students. The correlation of SCT results with grade point average (GPA) was measured. To evaluate the concurrent validity of SCT, the correlation between SCT scores and the final exam of the gynecology course was measured. To measure predictive validity, the correlation of SCT scores with comprehensive exams of midwifery was calculated. Data were analyzed using SPSS software. Descriptive statistics, Pearson correlation, and coefficient Cronbach&#39;s alpha were used for analysis. The test&rsquo;s item difficulty level (IDL) and item discriminative index (IDI) were determined using Whitney and Sabers&rsquo; method.<br> <strong>&nbsp;&nbsp; Results: </strong>The internal reliability of the test (calculated using Cronbach&rsquo;s alpha coefficient) was 0.74. All questions were positively correlated with the total score. The highest correlation coefficient was related to GPA and comprehensive test with the score of 0.91. The correlation coefficient between SCT and the final test (concurrent validity) was 0.654, and the correlation coefficient between SCT and comprehensive test (predictive validity) was 0.721. The range of item discriminative index and item difficulty level in this exam was 0.39-0.59 and 0.32-0.66, respectively.<br> <strong>&nbsp;&nbsp; Conclusion:</strong> SCT shows a relatively high internal validity and can predict the success rate of students in the comprehensive exams of midwifery. Also, it showed a high concurrent validity in the final test of gynecology course. This test could be a good alternative for formative and summative tests of clinical courses.&nbsp;<br> &nbsp;<br> &nbsp; Clinical decision-making, Problem-solving, Assessment, Educational, Clinical competence, Clinical skill, Midwifery, Psychometrics 434 439 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-3863-1&slc_lang=en&sid=1 Somayeh Delavari delavariso@gmail.com 200319475328460039600 200319475328460039600 No Department of Medical Education, School of Medicine, & Center for Educational Research in Medical Sciences, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Mitra Amini mitraamini51@yahoo.com 200319475328460039601 200319475328460039601 No Clinical Education Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. Zohreh Sohrabi zo_sohrabi@yahoo.com 200319475328460039602 200319475328460039602 Yes Center for Educational Research in Medical Sciences, School of Medicine, & Department of Medical Education, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Hamidreza Koohestani koohestani709@gmail.com 200319475328460039603 200319475328460039603 No Department of Medical Education, Saveh University of Medical Sciences, Saveh, Iran. Sajad Delavari sajadd@gmail.com 200319475328460039604 200319475328460039604 No Health Human Resources Research Center, School of Management & Information Sciences, Shiraz University of Medical Sciences, Shiraz, Iran. Rita Rezaee rezaeerita@yahoo.com 200319475328460039605 200319475328460039605 No Clinical Education Research Center, Shiraz University of Medical Sciences, Shiraz, Iran. Elaheh Mohammadi mohamadiel@yahoo.com 200319475328460039606 200319475328460039606 No Department of Medical Education, School of Medicine, Tehran University of Medi-cal Sciences, Tehran, Iran. Anne Demeester anne.demeester@univ-amu.fr 200319475328460039607 200319475328460039607 No Ecole Supérieure du Professorat et de I’éducation (ESPE), Aix-Marseille Université, EA4671 ADEF, 13 284 Marseille cedex07. Bernard Charlin bernard.charlin@umontreal.ca 200319475328460039608 200319475328460039608 No Centre de pédagogie appliquée aux sciences de la santé (CPASS), Université de Montréal, Montreal, QC, Canada. Masoomeh Kheirkhah 200319475328460039609 200319475328460039609 No Department of Midwifery and Reproductive Health, Nursing Care Research Center School of Nursing and Midwifery, & Center for Educational Research in Medical Sciences, School of Medicine, Iran University of Medical Scien