Dominance of General versus Specific Aspects of Wellbeing on the Student Subjective Wellbeing Questionnaire
The Student Subjective Wellbeing Questionnaire (SSWQ) is a 16-item measure of school-specific subjective wellbeing. Previous studies have found evidence supporting the interpretation of scores as consisting of four domain-specific factors (i.e., joy of learning, academic efficacy, educational purpose, school connectedness) along with a domain-general factor (i.e., general student wellbeing). We extended previous work to scrutinize the SSWQ factor structure and score reliability by analyzing responses from a large sample (N = 1,020) of adolescents in grades 9-12. Using confirmatory factor analyses, we reevaluated the previously supported SSWQ structures and tested the tenability of alternate bifactor models. Additionally, we tested if scores derived from simple summing of SSWQ item ratings were practically equivalent to model-derived factor scores. Results provided partial support for the replication of data-model fit for SSWQ correlated-factors and higher-order models. Model convergence problems were noted when fitting all 16 items to a bifactor structure with the educational purpose items identified as the key source of misfit and dropped. The revised 12-item bifactor model showed strong fit and was retained as the new preferred SSWQ structure. Reliability indices for the general student wellbeing score were consistently strong yet reliability of subscale scores was significantly weaker. Correlation between the domain-general sum scores of the 12- and 16-item versions was very strong (r = .98), suggesting significant overlapping variance. The correlation between the 12-item sum score and model-based general factor score was also very strong (r = .97) but did not meet our threshold for practical equivalence. We recommend future researchers reevaluate the SSWQ item content and factor structure and use model-based factor scores for analyses when operating in a latent factor framework. Ultimately, we emphasize interpreting the SSWQ general score over the subscale scores to parse individual differences or make decisions regarding intervention allocation.