Meal Memories Are Special: Superior Memory for Eating Versus Non-eating Behaviors

Seitz, Benjamin M., Aaron Blaisdell, and A. J. Tomiyama. 2019. “Meal Memories Are Special: Superior Memory for Eating Versus Non-eating Behaviors.” PsyArXiv. October 25. doi:10.31234/osf.io/d54cp

Abstract: Are all memories created equal, or are we biased to remember information most relevant to our evolutionary fitness? This question is underexplored in dominant models of memory that often treat all incoming information with equal potential to be remembered. We hypothesized that memory is systematically biased towards remembering fitness-relevant behaviors such as eating. While memory of eating has been shown to mediate hunger and food consumption, whether memory for a meal is itself special compared to non-meal related behaviors is unknown. We report memory of an eating behavior to be more accurate than memory of nearly identical, but non-eating related behaviors. We rule out a potential physiological explanation of this effect and suggest the behavioral aspect of eating is required for the mnemonic benefit. These results suggest the utility of exploring evolutionary influences on memory and demonstrate that the fitness relevance of a behavior potentiates its ability to be remembered.