it seems I forgot to add the link on applying quantum statistics to psychological studies of decision processes - i doubt it's new to this list but fwiw it's at : http://www.vub.ac.be/CLEA/aerts/publications/1994QuantumStatistics.pdf apologies for the lapse anyhow! wb --------------------------------- Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.