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In educational research, scholars and teachers have tried to establish the grade at which particular words should be taught by examining the ages at which children know various word meanings. This database of AoA estimates builds on Dale and O’Rourke’s Living Word Vocabulary for nearly 44 thousand meanings coming from over 31 thousand unique word forms and multiword expressions (Master file). We also added the AoA ratings from Kuperman et al. (2012), together with other ratings available at the time (file AoA_15715_words).
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