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![Cover for Frank B. Baker · The Basics of Item Response Theory Using R - Statistics for Social and Behavioral Sciences (Hardcover Book) [1st ed. 2017 edition] (2017)](https://imusic.b-cdn.net/images/item/original/041/9783319542041.jpg?frank-b-baker-2017-the-basics-of-item-response-theory-using-r-statistics-for-social-and-behavioral-sciences-hardcover-book&class=scaled&v=1496244758)