Category structure and the two learning systems of COVIS

Area of Science:

• Cognitive Neuroscience
• Neuroimaging
• Category Learning

Background:

• The COmpetition between Verbal and Implicit Systems (COVIS) model posits dual-route category learning: verbal and procedural.
• Existing research lacks clarity on which category structures activate specific COVIS systems.

Purpose of the Study:

• To investigate how novel category structures engage the verbal and procedural systems within the COVIS model.
• To explore the neural correlates of category learning using fMRI.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was employed to study brain activity during two distinct categorization tasks.
• Participants learned a simple, unidimensional rule and a complex rule potentially verbalizable categorization.

Main Results:

• Both categorization tasks significantly activated brain regions associated with the verbal system.
• Increased engagement of frontal lobe regions, including the left ventrolateral frontal cortex, was observed in the initial learning session for both tasks.

Conclusions:

• The findings suggest the verbal system is engaged by a broader range of category structures than previously assumed.
• Further research is needed to fully elucidate the interaction between verbal and procedural categorization systems.