Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) ISHIDA YUURI,Development of Categorization Based on Causal Relations : Preschool Children,The Japanese Journal of Educational Psychology,00215015,The Japanese Association of Educational Psychology,2011,59,1,39-50,https://cir.nii.ac.jp/crid/1390001204786217856,https://doi.org/10.5926/jjep.59.39