When emotions overwhelm concentration, what is being swamped is the mental capacity cognitive scientists call “working memory,” the ability to hold in mind all information relevant to the task at hand. What occupies working memory can be as mundane as the digits that compose a telephone number or as complicated as the intricate plot lines a novelist is trying to weave together. Working memory is an executive function par excellence in mental life, making possible all other intellectual efforts, from speaking a sentence to tackling a knotty logical proposition.2
