RT Journal Article SR Electronic A1 Zsírosová, Jarmila A1 Tomšik, Robert T1 Psychometric analysis of the activism and radicalism intention scales (ARIS) JF Diskuze v psychologii YR 2024 VO 5 IS 1 SP 1 OP 8 DO 10.5507/dvp.2023.013 UL https://diskuzevpsychologii.upol.cz/en/artkey/dps-202301-0001.php AB The aim of the study is to verify the psychometric properties of the ARIS scales - The Activism and Radicalism Intention Scales. The scale consists of eight items that saturate 2 factors: Activism Intention AIS and Radicalism Intention RIS. The scale was administered to students (n = 946) aged between 14 to 21 years. Of the total number of respondents, 74.0% were women. In order to verify the tool, a confirmatory factor analysis CFA, using the ML method, was used, with assessment of fit indices. The reliability of the tool was verified using Cronbach's α and McDonald's ω coefficients. Based on statistical analyses, it was found that the data adequately describe the model, and the results supported the two-factor structure of the Slovak version of the tool, χ<sup>2</sup> (58) = 94.406; p &lt; 0.002; RMSEA = 0.052 (90% CI 0.032-0.071); CFI = 0.981 a TLI = 0.982. The reliability of the tool was high, and the following values were measured for individual scales: AIS: α = 0.840, ω = 0.839; RIS: α = 0.820, ω = 0.818. Based on the results, it was found that the Slovak version of the ARIS scale achieved adequate psychometric properties for research purposes.