Psychometric Properties of the Coronavirus Stress Measure with Malaysian Young Adults: Association with Psychological Inflexibility and Psychological Distress

The COVID-19 pandemic has resulted in multiple physical and psychological stressors, which require quantification and establishment of association with other psychological process variables. The Coronavirus Stress Measure (CSM) is a validated instrument with acceptable validity and reliability. This study aimed to examine the psychometric properties of the CSM in a Malaysian population. University participants were recruited via convenience sampling using snowball methods. The reliability and validity of the Malay CSM (CSM-M) were rigorously evaluated, utilising both confirmatory factor analysis and Rasch analysis, in relation to sociodemographic variables and response to the depression, anxiety, and stress subscales of the Malay validation of the DASS-21, and also perceived stress (measured by the PSS) and psychological flexibility (AAQ-II). The sample comprised of 247 Malaysian participants. The McDonald's omega value for the Malay CSM was 0.935 indicating very good internal reliability. The CSM was significantly correlated with stress, anxiety, depression, perceived stress, and psychological flexibility. The Malay CSM properties were examined also with Rasch analysis, with satisfactory outcomes. There was positive correlated error between items 1 and 3, as well as negative correlated error between items 1 and 4. Hence, item 1 was excluded, leaving with 4 items. Confirmatory factor analysis demonstrated good data-model fit, and model fit statistics confirmed that Malay CSM showed a single-factor model. The Malay CSM hence demonstrates good validity and reliability, with both classical and modern psychometric methods demonstrating robust outcomes. It is therefore crucial in operational and research settings in establishing the true extent of stress levels as a consequence of the COVID-19 pandemic.