title: Abstraction of covariation in category learning: a critical note on K. Richardson's studies.
abstract: Several studies directed by K. Richardson (Richardson, 1986, 1987; Richardson & Carthy, 1989, 1990) claimed that people are able to abstract imperfect covariations among feature variables defining artificial categories, and to use that information in various subsequent tasks. We challenge this claim on a twofold basis. First, a large part of the performance variance Richardson attributed to covariation knowledge may be accounted for by a very simple exemplar model, which assumes no abstractive processes. Second, the residual influence of relational information on performance may be attributed to the knowledge subjects have acquired in real-world situations before their training with the study exemplars.
authors.affiliation: Laboratoire de Psychologie Différentielle, Université René Descartes, Paris, France.
authors.forename: P
authors.initials: P
authors.lastname: Perruchet
authors.forename: C
authors.initials: C
authors.lastname: Pacteau
authors.forename: J
authors.initials: J
authors.lastname: Gallego
mesh_terms: D000704:Analysis of Variance; D001288:Attention; D003210:Concept Formation; D006801:Humans; D011939:Mental Recall; D015233:Models, Statistical; D010364:Pattern Recognition, Visual