Aim and Background: Excessive and addictive use of Instagram can have significant negative effects on people's mental and physical health. This study aimed to examine the psychometric properties of the Persian version of the Instagram Addiction Test in Iran.
Methods and Materials: The research design was descriptive-correlational, more precisely, it was the
validation of the test. The statistical population comprised students of Dezful University of Medical Sciences in the academic year 2023-2024. Considering the number of variables, 260 individuals were selected using a multi-stage cluster random sampling method. Data collection instruments included the Instagram Addiction Test (D’Souza et al, 2018, TIA-26), the Facebook Addiction Test (Andreassen et al 2012, FAS-6), and the Brief Scale of Psychological Well-Being (Ryff & Singer, 2002, RPWS-18). The scale's factor structure was assessed through confirmatory factor analysis, while internal consistency, convergent and divergent validity were also evaluated. Data analysis was performed using SPSS version 26 and AMOS version 24 software's.
Findings: The results showed that this test consists of five factors. Confirmatory factor analysis was used to measure the five-factor structure, and its findings showed that the five-factor model fit indices had an acceptable fit with the data. Cronbach's alpha coefficients also had acceptable values. Also, to examine the convergent and divergent validity, the FAS-6 and RPWS-18 scales were used simultaneously. The findings showed that the present test has a positive and significant relationship with the FAS-6 scale and a negative and significant relationship with the RPWS-18 questionnaire (p<0.05).
Conclusions: The findings suggest that the Persian form of Test for Instagram Addiction (TIA) is a reliable and valid instrument for assessing the risk of Instagram addiction among Iranian students. Its applicability extends to diverse clinical and research settings