PEBL implementation of the 50 question Big-five personality scale, 
from ipip.ori.org (incorporating subscales for intro/extraversion, agreeableness, conscientiousness, emotionality, and intellectualism)

See:  Goldberg, L. R. (1992).  The development of markers for the
      Big-Five factor structure.  Psychological Assessment, 4, 26-42.

Parameters allow you to randomize the order in which questions appear, and to select which of five subscales you wish to administer.
  parpairs <- [["shufflequestions",1],
               ["doExt",1],
               ["doAgr",1],
               ["doCon",1],
               ["doEmo",1],
               ["doInt",1]]
