> >Stefan Berreth wrote: > > > >>> A mental model is [...] > These two comments reveal you misconception: A model is not a > representation! But it is very true that a model is in people's mind. Hang on there! The words "model" and "representation" are two of the trickiest words in cognitive science. It simply isn't possible to pronounce authoritatively on what they "really" mean. There is a horribly confused literature out there on "mental models". I know, I reviewed it for my PhD. Just because you may not think you are confused, doesn't give you the right to legislate against other people's confusion:-) Much better to start this kind of comment with "according to (whoever...)" C'mon, give us the paper URLs so that anyone who wants to debate your debateable points can have something to get their teeth into. On second thoughts, don't, because that discussion doesn't really fit onto this list. Regards Simon -- Simon Grant - lecturer, Connect (best addressed title-free) e-mail: mailto:[log in to unmask] URL: http://www.csc.liv.ac.uk/~simon/home.html mobile phone: 0410031657 office: 0151 7948268 fax: 0151 7948270