The research mentioned in this article echoes research published by the University of Massachusetts Amherst in 2013. In that study, one of the same researchers, Rebecca Spencer, worked with colleagues to test the effect of naps on memory in preschoolers and came to the same conclusion as this study. The 2013 study was billed as first concrete evidence to support the educational benefit of naptime for preschoolers. This conclusion seems logical, since even adult memories have been shown to improve after a nap.