Claim: The Pittsburgh Sleep Quality Index gets a good rating for its construct validity and discriminative validity in assessing sleep quality.
Evidence: Evaluation of validity and utility for the Pittsburgh Sleep Quality Index* Construct validity (e.g., predictive, concurrent, convergent, and discriminant validity) Good Discriminative validity Good The Pittsburgh Sleep Quality Index (PSQI) is a self-report questionnaire that assesses sleep quality over a 1-month time interval.