发育英语词典项目：9961个高频英语词的连续阅读难度评估

Abstract The developmental English Lexicon Project (d-ELP) is a database comprising word reading data for 9,961 of the most frequently printed English words for children, including continuous item response theory (IRT)-based estimates of word reading difficulty, accompanying word characteristics, and raw trial-level data. Data on isolated word reading accuracy were collected from 1,907 children in grades 1–5 across multiple US sites. Each child read a list of words ranging from 250 to 500 items depending on reading skill (less proficient children were often unable to finish the entire list of