Individuals do not always perform to their full capability on cognitive tasks. When this occurs, the usual explanation is that the individual was not properly motivated. But this begs the important question: How and why does motivation interact with and influence cognitive processing and the control processes that regulate it? What are the underlying mechanisms that govern such interactions? Motivation has been an important component of psychology and neuroscience throughout the history of the field, but has recently been rejuvenated by rapidly accelerating research interest in the nature...