text: Taxometric research methods, Paul Meehl's creation
  Distinguishing categories from dimensions, that's the foundation
  We delved deep, reviewed the published research
  177 articles, 311 findings, we did search
  
  533,377 participants in our combined sample
  To analyze the variables, we set an example
  Multilevel logistic regression was the tool we chose
  To explore the factors, both methodological and substantive, that pose
  
  Taxonic findings, the categorical ones we sought
  38.9% we found, but hold your thought
  In recent studies, they've become less frequent
  Stronger methods, simulated indices, they're not so lenient
  
  When we controlled for confounds statistically
  The prevalence of taxonic findings, it's not so tricky
  Estimated at 14%, that's the true extent
  Of these categorical findings, we present
  
  Normal personality, mood disorders, anxiety's grip
  Eating disorders, externalizing disorders, they slip
  No persuasive evidence of taxa, we found
  In personality disorders, nothing profound
  
  But there's some hope, some evidence we sight
  In schizotypy and substance use disorders, they ignite
  Autism too, shows promising signs
  Psychological taxa, they may define
  
  This review tells us, psychiatrists, psychologists take heed
  Most latent variables, dimensions they breed
  Those influential findings, from early research they claim
  Spurious they may be, don't put them in the hall of fame