@misc{KlieglOlsonDavidson2009,
  author    = {Reinhold Kliegl and Richard K. Olson and Brian J. Davidson},
  title     = {On problems of unconfounding perceptual and language processes},
  institution = {Department Psychologie},
  series    = {Zweitver{\"o}ffentlichungen der Universit{\"a}t Potsdam : Humanwissenschaftliche Reihe},
  number    = {paper 140},
  type      = {postprint},
  year        = {2009},
}