c(person("John", "Fox", role = c("aut", "cre"), email = "jfox@mcmaster.ca"),
             person("Adrian", "Dusa", role = "ctb"))
stats, mvtnorm, Matrix, parallel, admisc (>= 0.22)
Computes polychoric and polyserial correlations by quick "two-step" methods or ML, 
  optionally with standard errors; tetrachoric and biserial correlations are special cases.
John Fox [aut, cre],
  Adrian Dusa [ctb]