Open Peer Commentary
Mitchell et al.'s claim, that their propositional theory is a single-process theory, is illusory because they relegate some learning to a secondary memory process. This renders the single-process theory untestable. The propositional account is not a process theory of learning, but rather, a heuristic that has led to interesting research.
The propositional nature of human associative learning Chris J. Mitchell, Jan De Houwer and Peter F. Lovibond School of Psychology, University of New South Wales, Kensington 2052, Australia firstname.lastname@example.org http://www.psy.unsw.edu.au/profiles/cmitchell.html; Department of Psychology, Ghent University, Henri Dunantlaan 2, B-9000 Ghent, Belgium email@example.com http://users.ugent.be/~jdhouwer/">; School of Psychology, University of New South Wales, Kensington 2052, Australia firstname.lastname@example.org http://www.psy.unsw.edu.au/profiles/plovibond.html">