title: University student depression inventory (USDI): confirmatory factor analysis and review of psychometric properties.
abstract: BACKGROUND
  The 30-item USDI is a self-report measure that assesses depressive symptoms among university students. It consists of three correlated three factors: lethargy, cognitive-emotional and academic motivation. The current research used confirmatory factor analysis to asses construct validity and determine whether the original factor structure would be replicated in a different sample. Psychometric properties were also examined.
  
  
  METHODS
  Participants were 1148 students (mean age 22.84 years, SD=6.85) across all faculties from a large Australian metropolitan university. Students completed a questionnaire comprising of the USDI, the depression anxiety stress scale (DASS) and Life Satisfaction Scale (LSS).
  
  
  RESULTS
  The three correlated factor model was shown to be an acceptable fit to the data, indicating sound construct validity. Internal consistency of the scale was also demonstrated to be sound, with high Cronbach alpha values. Temporal stability of the scale was also shown to be strong through test-retest analysis. Finally, concurrent and discriminant validity was examined with correlations between the USDI and DASS subscales as well as the LSS, with sound results further supporting the construct validity of the scale. Cut-off points were also developed to aid total score interpretation.
  
  
  CONCLUSIONS
  Response rates are unclear. In addition, the representativeness of the sample could be improved potentially through targeted recruitment (i.e. reviewing the online sample statistics during data collection, examining the representativeness trends and addressing particular faculties within the university that were underrepresented).
  
  
  CONCLUSIONS
  The USDI provides a valid and reliable method of assessing depressive symptoms found among university students.
authors: Queensland University of Technology, School of Psychology & Counselling, Institute of Health & Biomedical Innovation, Level 5, O Block, B Wing, Victoria Park Road, Kelvin Grove, Queensland 4059, Australia.
authors: Madeline
authors: M
authors: Romaniuk
authors: Nigar G
authors: NG
authors: Khawaja
mesh_terms: D001315:Australia / Q000453:epidemiology; D003071:Cognition; D003863:Depression / Q000453:epidemiology*; D003866:Depressive Disorder / Q000453:epidemiology*; D004644:Emotions; D005163:Factor Analysis, Statistical; D005260:Female; D006801:Humans; D053609:Lethargy / Q000453:epidemiology; D008297:Male; D009042:Motivation; D010555:Personality Inventory; D011594:Psychometrics / Q000706:statistics & numerical data; D015203:Reproducibility of Results; D057566:Self Report; D013334:Students / Q000523:psychology*; D014495:Universities; D055815:Young Adult
keywords: Assessment; Confirmatory factor analysis; Depression; Student; USDI