The Onset of Working Memory in Infants
J. Steven Reznick, Judy D. Morrow, Barbara Davis Goldman, and Jessica Snyder
Department of Psychology, University of North Carolina at Chapel Hill

We used an optimized configuration of the delayed-response task to explore the ability of young infants to remember which of 2 locations was correct across 12 trials after a 1- to 2-sec delay. Performance improved with age, particularly after 5.5 months. These findings suggest an onset of appreciable working memory for many infants in the middle of their 6th month.