The Cognitive Revolution was an intellectual movement in the 1950s and 1960s focused on using the scientific method to understand human cognition, otherwise known as the process of learning and memory. This revolution in the field of psychology was happening at the same time that neuroscientists like Hubel and Wiesel were exploring how neurons in the brain are organized to enable behaviors such as visual perception. It was in this environment that both Peter and Janellen developed further as scientists. The connections between their respective fields provided fodder for discussion and debate throughout their careers. Peter focused on cellular events and biological processes in developmental neuroscience, while Janellen probed the mechanisms of human verbal and mathematical learning and memory.