Adaptation and Psychometric Propertiesof the Public Speaking Anxiety Scale (PSAS)

Abstract

This study aimed to adapt and identify the psychometric properties of the Indonesian version of the Public Speaking Anxiety Scale (PSAS). The PSAS was developed by Bartholomay and Houlihan (2016) and consists of 17 items measuring three aspects of public speaking anxiety: cognitive, behavioral, and physiological. The study involved 600 university students as participants. The adaptation process followed the guidelines of the International Test Commission (ITC) to ensure linguistic and cultural equivalence. Content validity was assessed using Aiken’s V, with coefficients ranging from 0.66 to 1.00. The results indicated that all items were considered valid. Construct validity was evaluated in two stages: exploratory factor analysis (EFA) and confirmatory factor analysis (CFA). The scale’s reliability was assessed using Cronbach’s Alpha. The EFA revealed three factors consistent with the theoretical structure of the scale, and the CFA showed that the measurement model had a good fit to the data (RMSEA = 0.075; CFI = 0.950; TLI = 0.941; SRMR = 0.052). The scale also demonstrated high internal consistency, with a total alpha value of 0.872. Based on these findings, the Indonesian version of the PSAS is considered to have good psychometric properties and is suitable for measuring public speaking anxiety among Indonesian university students.