Cognitive labor or the third shift is sociological and feminist concept referring to the invisible mental work many women do in relationships and families. It is related to invisible labor, emotional labor, and unpaid work while emphasizing the cost of planning, organizing, scheduling, managing and worrying, in addition to "executing." The distribution of cognitive labor falls disproportionately on women. Handling the majority of cognitive labor is a burden that prevents women from pursuing opportunities or achieving greater health and happiness. A recommendation for balancing cognitive labor is making it more explicit and visible.