A, Significant cortical activity was observed in channels over right dlPFC (measurement sensitivity map shown) during Switch 2 relative to Stay 2 in infants who demonstrated subsequent transfer of the rule structures. B, Partial regression plot illustrating the relation among right dlPFC activity, eye blink rate, and transfer performance. Results from the regression analysis indicated that a conjunction between eye blink rate and the change in right dlPFC activity (from the beginning to the end of each block) predicted transfer performance during the subsequent inference test. In particular, infants with a higher blink rate combined with a greater change in right dlPFC activity showed better transfer performance.