Behavioral and Brain Sciences

Short Communication

In search of radical similarity

Oscar Vilarroya a1
a1 Unitat de Recerca en Neurociència Cognitiva, IMPU, Universitat Autònoma de Barcelona, 08035 Barcelona, Spain


It is difficult to see how one can support the continuum between rules and similarity, as Pothos proposes. A similarity theory could dispense with the rules end of the continuum. The only thing that we need is one (or more than one) theory of similarity that goes beyond the stimulus-carrying information and behavioristic restrictions that have usually been attributed to similarity theories.