1. Challenging assumptions about concepts;Barsalou;Cognitive Development,1993
2. Secondary generalization and categorization in pigeons;Bhatt;Journal of the Experimental Analysis of Behavior (Special Issue on the Experimental Analysis of Cognition),1989
3. Domain-specific knowledge and conceptual change;Carey,1994
4. Essentialist beliefs in children: The acquisition of concepts and theories;Gelman,1994
5. Categories and causality;Gelman,1993