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Objective: This study aimed to assess the validity and reliability of the Turkish version of DSM-5 Level 1 Cross-Cutting Symptom Scale’s child and parent forms. Methods: The scale was prepared by carrying out the translation and back translation of DSM-5 Level 1 Cross-Cutting Symptom Scale’s Child and Parent Forms. Study group con-sisted of community and clinical samples. The scale was applied to 244 parents and 320 adolescents that repre-sented the clinical and community sample. For the assessment, Strengths and Difficulties Questionnaire (SDQ) was used along with Level 1 Cross-Cutting Symptom Scale. For reliability analyses, internal consistency coefficient and item- total score correlation analysis, test- retest factor analysis, interrater reliability and as for validity analyses; exploratory factor analysis and correlation analysis with Strengths and Difficulties Questionnaire for concurrent validity were carried out. Results: Cronbach’s alpha values for DSM-5 Level 1 Cross-Cutting Symptom Scale’s Child Form was 0.893 while 0.90 for parent form. Correlation coefficient of DSM 5 Level 1 Cross-Cutting Symptom Scale as a result of its correlation with Strengths and Difficulties Questionnaire was 0.698 for child form and 0.706 for parent form which was statistically significant. Correlation coefficient in test-retest application was r=0.965 for child form and r=0.919 for parent form. As for construct validity, six factors were maintained that would explain 59.3% of the variance in child form. In the parent form, five factors were maintained that would explain 60.3% of the total variance. Conclusion: It was seen that Turkish version of DSM-5 Level 1 Cross-Cutting Symptom Scale could be used as a valid and reliable tool both in clinical practice and for research purposes