Before revision: In a 2011 study by Lauricella, Gola, and Calvert, eight 21-month-old infants were taught seriation sequencing by one of two characters.
After revision: (placing objects in the correct order—in this study, nesting a set of cups of various sizes)In a 2011 study by Lauricella, Gola, and Calvert, eight 21-month-old infants were taught seriation sequencing by one of two characters.