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Schoen, R. E., Tangen, C. M., Kuller, L. H., Burke, G. L., Cushman, M., Tracy, R. P. et al. (1999). Increased blood glucose and insulin, body size, and incident colorectal cancer. Journal of the National Cancer Institute, 91, 1147-1154. doi:10.1093/jnci/91.13.1147

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• TITLE: Improved Self-Control Associated with Using Relatively Large Amounts of Glucose: Learning Self-Control Is Metabolically Expensive

  AUTHORS: Matthew T. Gailliot

  KEYWORDS: Self-Control; Self-Regulation; Glucose; Metabolism; Learning; Fatigue; Energy; Memory

  JOURNAL NAME: Psychology, Vol.3 No.11, November 29, 2012

  ABSTRACT: The current study examined whether changes in glucose during a self-control task would predict changes in self-control performance later on. Participants attended two experimental sessions, spaced two weeks apart. During each session, they had their glucose measured, completed the Stroop task as a measure of self-control, and then had their glucose measured again. Larger decreases in glucose (from before to after the Stroop task) during the first session predicted larger increases in improvement on the Stroop task dur- ing the second session, in the form of increased speed. Learning self-controlmight benefit from using lar- ger amounts of glucose. Learning self-control is metabolically expensive. These findings raise the possi- bility that self-control fatigue occurs because metabolic energy is depleted during the learning of self- control.