Back to matchesWe found a matchYour institution may have rights to this item. Sign in to continue.TitleVariability in Single Digit Addition Problem-Solving Speed Over Time Identifies Typical, Delay and Deficit Math Pathways.AuthorsReeve, Robert A.; Gray, Sarah A.; Butterworth, Brian L.; Paul, Jacob M.SubjectsPROBLEM solving; SHORT-term memory; INTELLIGENCE levels; MATHEMATICAL ability; NONVERBAL intelligence testsPublicationFrontiers in Psychology, 2018, p1ISSN1664-1078Publication typeArticleDOI10.3389/fpsyg.2018.01498