Key points are not available for this paper at this time.
Department of Psychology and Centre for Research on Pain, McGill University, Montreal, QC H3A 1B1, Canada *Corresponding author. Tel.: +1 514 398 6085; fax: +1 514 398 4896. E-mail: email protected Submitted June 15, 2005; accepted June 21, 2005.
Mogil et al. (Fri,) studied this question.