Roger Stanton

Roger Stanton Investigates Dissociation of Category-Learning Systems

This article investigates a reported dissociation of multiple category-learning systems in which category number impacted rule-based category learning but not information-integration category learning.  This article presents evidence that when the category structures are equated along important characteristics, category number does impact learning of information-integration categories.  Furthermore, model-based analyses demonstrate that the results are consistent with a single-system model of category learning.

Roger Stanton | Category Structures Based on an XOR Rule

This article demonstrates a limitation of the classic Shepard, Hovland and Jenkins (1961) study in which a category structure based on an XOR rule (Type II) is learned faster than a linearly separable category (Type IV).  The article documents several instances for which the Type IV category is learned faster than the Type IV category structure.  Furthermore, it is shown that when the instructions bias the participants to focus on “rules” and “relevant dimensions”, the Type II advantage re-emerges for some types of stimuli.