Brain activity across the development of automatic categorization: A comparison of categorization tasks using multi-voxel pattern analysis

► MVPA was used to study the development of automaticity in categorization tasks. ► With training, common activation patterns across tasks decreased in basal ganglia. ► With training, tasks became more difficult to discriminate using activation. ► With training, patterns of representational similarity became similar across tasks. ► Results suggest two learning systems and one automaticity system in categorization.