1 Faculty of Psychology and Education Sciences, University of Geneva, 40 Boulevard du Pont d'Arve, CH-1205 Geneva, Switzerland. Anik.DeRibaupierre@unige.ch.
2 Faculty of Psychology and Education Sciences, University of Geneva, 40 Boulevard du Pont d'Arve, CH-1205 Geneva, Switzerland. Thierry.Lecerf@unige.ch.
Developmental cognitive psychology (as well as cognitive psychology in general) has a long-standing tradition to ignore all variations other than age, as if individual variations were only measurement error or noise[...].