Psychometric Evaluation of the Insomnia Severity Index in U.S. College Students.

ABSTRACT: Psychometric properties of the Insomnia Severity Index (ISI) were analyzed in U.S. college samples. ISI items and total score with sleep and psychosocial questionnaires were examined in Experiment I. ISI diagnostic accuracy in a clinical sample with and without insomnia was assessed in Experiment II. ISI test-retest validity, confirmatory factor analysis (CFA), and item response theory via graded response model (GRM) were assessed in Experiment III. Results indicated analogous ISI and sleep diary items showed moderate correlations (r₁ = .40; r₂ = .45). The ISI total had weak to strong correlations with other indicators of sleep-related disturbance (rs = .25-.62). The ISI had weak to moderate correlations with psychosocial measures commonly associated with insomnia (rs

SUBMITTER: Emert SE 

PROVIDER: S-EPMC11341948 | biostudies-literature | 2024 Sep

REPOSITORIES: biostudies-literature