text: Yo, check it out, I got a study to drop,
  (Jamieson and Howk, '92, Int. J. Psychophysiol., non-stop).
  Computer simulations, we runnin' the game,
  Analyzin' factors, ain't nothin' the same.
  
  Four factors we found, let me break it down,
  (1) Measurement error, makin' the correlation drown,
  (2) Floor and ceiling effects, yo, it's real,
  The 'real Law of initial values', that's the deal.
  
  (3) Reactivity, messin' with the flow,
  (4) Skewness, gotta watch how it goes.
  But hold up, there's more, a fifth factor we see,
  Change in variance, influencin' rdx, believe me.
  
  When variance goes up, rdx turns positive,
  When it goes down, rdx gets negative.
  These five factors, they ain't playin' fair,
  Messin' with rdx through mechanisms we share.
  
  Regression to the mean, it's in the mix,
  Variance change, that's another trick.
  Separatin' the 'real Law of initial values' ain't easy,
  All these factors got us feelin' queasy.
  
  So there you have it, the study's conclusion,
  Factors affectin' rdx, it's a whole confusion.
  But we keep pushin', tryna understand,
  Psychophysiology, we in command.