{"pk":27603,"title":"Comparing comparison indices: Assessing the validity of different magnitudecomparison measures across presentation formats and age groups","subtitle":null,"abstract":"Magnitude comparison tasks are used to assess the precision of numerical representations. Recent research, how-ever, questions the validity of different measures of magnitude comparison. We investigated the validity of five performancemeasures: overall RT, overall accuracy, numerical ratio effect (RT), numerical ratio effect (accuracy), and Weber fraction.Kindergarten and university students completed symbolic and non-symbolic magnitude comparison tasks and a math skill mea-sure. For children and adults, we calculated Chronbach’s α separately for each presentation format. All values were in theunacceptable range, indicating that the different indices were not measuring the same construct. For children, a multiple re-gression predicting KeyMath scores from symbolic and non-symbolic indices showed that only non-symbolic overall accuracyand symbolic overall RT were predictors. For adults, a multiple regression predicting French Kit scores showed that only thesymbolic numerical ratio effect (RT) was a predictor. No index demonstrated predictive validity across formats or age groups.","language":"eng","license":{"name":"","short_name":"","text":null,"url":""},"keywords":[],"section":"Posters: Member Abstracts","is_remote":true,"remote_url":"https://escholarship.org/uc/item/6q79016r","frozenauthors":[{"first_name":"Marcie","middle_name":"","last_name":"Penner-Wilger","name_suffix":"","institution":"King’s University College at Western University","department":""},{"first_name":"Aaron","middle_name":"","last_name":"Cecala","name_suffix":"","institution":"Elizabethtown College","department":""},{"first_name":"Melissa","middle_name":"","last_name":"Elfers","name_suffix":"","institution":"King’s University College at Western University","department":""}],"date_submitted":null,"date_accepted":null,"date_published":"2017-01-01T18:00:00Z","render_galley":null,"galleys":[{"label":"PDF","type":"pdf","path":"https://journalpub.escholarship.org/cognitivesciencesociety/article/27603/galley/17239/download/"}]}