Development of the Sleep Acceptance Scale (SAS)

This study aimed to develop a new measure of sleep acceptance, the Sleep Acceptance Scale (SAS), and evaluate its psychometric properties. Participants were 1419 adults, with and without insomnia symptoms, who completed the SAS and several other questionnaires related to sleep, anxiety, and depression. Results from parallel analysis and exploratory factor analysis suggested that the SAS consisted of two latent factors: Avoidance and Distress. Confirmatory factor analysis found that the 2-factor model provided a good fit and had high factor loadings. The SAS had moderate to high internal consistency and showed construct validity by being positively correlated with measures of insomnia, anxiety, and depression and negatively correlated with a measure of sleep problem acceptance. Overall, the study provides preliminary evidence that the SAS is a valid tool for assessing the acceptance of sleep problems.