Psychometric Evaluation of the Nomophobia Questionnaire Among Iranian Adolescents
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Objective: This study aimed to evaluate the psychometric properties of the Nomophobia Questionnaire among Iranian adolescents.
Methods and Materials: This descriptive-correlational psychometric study was conducted among high school students in western Tehran during the 2024–2025 academic year. A total of 225 adolescents were selected using cluster sampling. Data were collected using the Nomophobia Questionnaire, the General Health Questionnaire, the Rosenberg Self-Esteem Scale, and the Adolescent Cyber Psychological Pathology Questionnaire. Content validity was assessed using the content validity ratio and content validity index. Construct validity was examined through confirmatory factor analysis, and criterion-related validity was assessed through correlations with external measures. Reliability was evaluated using Cronbach’s alpha and split-half reliability. Statistical analyses were performed using SPSS 27 and AMOS.
Findings: The findings indicated that the Nomophobia Questionnaire had satisfactory psychometric properties in Iranian adolescents. Internal consistency was acceptable (Cronbach’s alpha = 0.849), and split-half reliability supported score consistency. Content validity indices were favorable for all items. Item-total correlations were significant for all retained items. Confirmatory factor analysis supported the structural validity of the measure after removal of items with weak loadings, and model fit indices indicated good fit, including CFI = 0.981, TLI = 0.966, GFI = 0.972, and RMSEA = 0.07. In addition, the questionnaire showed evidence of convergent and discriminant validity.
Conclusion: The Nomophobia Questionnaire demonstrated acceptable validity and reliability among Iranian adolescents and can be used as a suitable instrument for assessing nomophobia in this population.
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