text: Yo, check it out, this study right here
  Descriptive correlational, makin' things clear
  We talkin' 'bout the translation process
  And the psychometric testin' of the PSQI, no less
  
  The Pittsburgh Sleep Quality Index, that's the name
  Successfully translated to Arabic, no game
  Then back-translated to English, by ten translators
  Arabic bilinguals, nothin' could be greater
  
  Sample of 35 healthy bilinguals, no doubt
  Testin' the PSQI, what's it all about?
  Internal consistency reliability, that's what we seek
  Global PSQI, borderline acceptability, peek
  
  Cronbach's alpha at .65, that's the score
  Reliability supported, we want more
  Moderate to high correlations, we see
  Between five PSQI components, and global PSQI (you feelin' me?)
  
  Convergent validity, it's all in the mix
  Global PSQI correlatin' strong with Insomnia Severity Index
  And moderately with the Medical Outcome Study
  Short Form-36 vitality subscale, that's the key
  
  But hold up, we need more testin', don't stop
  In a larger Arabic population, we gotta pop
  Clinical and healthy populations, livin' in their native lands
  PSQI, gotta expand, gotta understand
  
  So there you have it, the study's conclusion
  PSQI translation and testing, no illusion
  In the world of sleep quality assessment, this is the way
  Rap style, droppin' knowledge, that's how we play