Can a global score be derived from the Integration of Stressful Life Experiences Scale-Short Form (ISLES-SF)? Empirical support for a bi-factor model.

The Integration of Stressful Life Experiences Scale-Short Form (ISLES-SF) is a popular, two-factor measure of meaning-making. Although researchers have used this instrument to calculate a global index of meaning-making, there has been little evidence to support this practice. Therefore, the objective of this study was to examine the validity of this approach by analyzing data from 2,380 American adults during the beginning of the COVID-19 pandemic. A series of confirmatory factor analyses, reliability analyses, and concurrent validity analyses support a bi-factor model of meaning-making. These results affirm the practice of not only using the ISLES-SF to measure meaning-making at a global level, but also to interpret its two specific dimensions (Comprehensibility and Footing in the World) as well.