The purpose of the present article is to highlight limitations of Lange and Eggert’s methodology of using
identical self-control tasks in testing effects of glucose on depletion of self-control resources and selfcontrol
performance.We suggest that when participants engage in two identical self-control tasks, cognitions
developed during initial act of self-control may mask the effects of glucose on self-control performance
by undermining willingness to exert effort during the second act of self-control. As a consequence, glucose
may increase ability to exercise self-control but participants may not want to capitalize on this “ability
advantage” because they are unwilling to exercise self-control. The present article concludes that researchers
who test the glucose hypothesis in the context of a depletion paradigm should employ dissimilar
acts of self-control and ensure that depleted participants are sufficiently motivated to exercise
self-control.