TY - JOUR T1 - How Big Is Big Enough? Sample Size Requirements for CAST Item Parameter Estimation JF - Applied Measurement in Education Y1 - 2006 A1 - Chuah, Siang Chee A1 - F Drasgow A1 - Luecht, Richard VL - 19 UR - http://www.tandfonline.com/doi/abs/10.1207/s15324818ame1903_5 ER -