The Short Inventory on Stress and Well-Being : A psychometric evaluation of the Well-Being Indicators

Abstract

The aim of the current study was to evaluate the psychometric characteristics (i.e., the validity and the reliability) of the Short Inventory on Stress and Well-being (S-ISW), in particular the part of the S-ISW that measures well-being. The S-ISW is developed by ISW Limits in both Dutch and French and measures the following well-being indicators: strain, motivation and negative acts at work, which can be considered as possible outcome variables or employees’ reactions to the perceived work situation. Four samples (N1 = 17,781; N2 = 462; N3 = 264; N4 = 3596) were used to perform analyses, with longitudinal data available for Sample 2 and 3. The results supported the three-factor structure of the S-ISW (factor validity) and the invariance of this factor structure between the Dutch and the French S-ISW. Furthermore, we established the content similarity of strain and motivation with negative stress and positive stress, respectively, supporting the construct validity of the S-ISW. The predictive validity of the well-being indicators was established using measures of absenteeism and doctor consultations. Finally, the S-ISW was reliable, as the indicators of well-being showed high test-retest reliability and adequate internal consistency. The part of the S-ISW that measures well-being is thus both valid and reliable, and may be a helpful instrument in conducting research to aid organizations in the development of their well-being policy.