10.1184/R1/6617906.v1 Lisa K. Fazio Lisa K. Fazio Drew H. Bailey Drew H. Bailey Clarissa A. Thompson Clarissa A. Thompson Robert Siegler Robert Siegler Relations of different types of numerical magnitude representations to each other and to mathematics achievement. Carnegie Mellon University 2014 Fractions Magnitude representations Approximate number system Mathematics achievement Number line estimation Magnitude comparison 2014-07-01 00:00:00 Journal contribution https://kilthub.cmu.edu/articles/journal_contribution/Relations_of_different_types_of_numerical_magnitude_representations_to_each_other_and_to_mathematics_achievement_/6617906 <p>We examined relations between symbolic and non-symbolic numerical magnitude representations, between whole number and fraction representations, and between these representations and overall mathematics achievement in fifth graders. Fraction and whole number symbolic and non-symbolic numerical magnitude understandings were measured using both magnitude comparison and number line estimation tasks. After controlling for non-mathematical cognitive proficiency, both symbolic and non-symbolic numerical magnitude understandings were uniquely related to mathematics achievement, but the relation was much stronger for symbolic numbers. A meta-analysis of 19 published studies indicated that relations between non-symbolic numerical magnitude knowledge and mathematics achievement are present but tend to be weak, especially beyond 6 years of age.</p>