title: Test-re-test reliability of two sustained attention tests in persons with chronic stroke.
abstract: OBJECTIVE
  To investigate the test-re-test reliability of the Conners' Continuous Performance Test II (CCPT) and Digit Vigilance Test (DVT) in persons with chronic stroke.
  
  
  METHODS
  Thirty-nine persons with stroke participated in this study. The participants were twice administered both the CCPT and DVT over a 1-week interval.
  
  
  RESULTS
  The CCPT performance was reported by two error measures (i.e. Omissions and Commissions) and three time measures (i.e. Hit Reaction Time, Hit Reaction Time Standard Error and Variability of Standard Error). These five measures of the CCPT had good-to-excellent test-re-test reproducibility (ICCs = 0.70-0.90) and limited substantial random measurement errors (SEM% = 7.6-75.2%). Only the Commissions demonstrated substantial practice effects (Cohen's effect size d = 0.38). The DVT had two indicators: the Total Error measure had moderate reproducibility (ICC = 0.55), substantial practice effects (d = 0.30) and random measurement errors (SEM% = 60.8%); the Total Time measure showed excellent reproducibility (ICC = 0.91), less practice effects (d = 0.10) and limited random measurement errors (SEM% = 10.1%).
  
  
  CONCLUSIONS
  Only the time measures (i.e. Hit Reaction Time for the CCPT and Total Time for the DVT) had satisfactory test-re-test reliability in persons with chronic stroke, which implies that the time measures are good indicators of sustained attention on both tests.
authors.affiliation: School of Occupational Therapy, College of Medicine, National Taiwan University, Taipei, Taiwan.
authors.forename: Hui-Chun
authors.initials: HC
authors.lastname: Chen
authors.forename: Chia-Lin
authors.initials: CL
authors.lastname: Koh
authors.forename: Ching-Lin
authors.initials: CL
authors.lastname: Hsieh
authors.forename: I-Ping
authors.initials: IP
authors.lastname: Hsueh
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001288:Attention / Q000502:physiology*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009483:Neuropsychological Tests; D011594:Psychometrics; D011930:Reaction Time / Q000502:physiology*; D015203:Reproducibility of Results; D020521:Stroke / Q000503:physiopathology*; D000071939:Stroke Rehabilitation