title: ANIMAL COGNITION. Comment on "Number-space mapping in the newborn chick resembles humans' mental number line".
abstract: Rugani et al. (Reports, 30 January 3015, p. 534) tested 3-day-old domestic chicks using an innovative experimental setup and demonstrate the presence of the mental number line. We raise concerns regarding this conclusion by highlighting the possible loopholes in the experimental design and the data analysis procedures. We further suggest auxiliary experiments that can substantiate the authors' claim.
authors.affiliation: Department of Psychology, University of Georgia, Athens, GA 30602, USA. madhur.mangalam@uga.edu.
authors.forename: Madhur
authors.initials: M
authors.lastname: Mangalam
authors.affiliation: Indian Institute of Science Education and Research Pune, Pune 411 008, India.
authors.forename: Shraddha Madhav
authors.initials: SM
authors.lastname: Karve
mesh_terms: D000818:Animals; D002645:Chickens / Q000502:physiology*; D003071:Cognition; D006801:Humans; D055641:Mathematical Concepts; D008606:Mental Processes; D065855:Spatial Processing