Copyright © American Speech-Language-Hearing Association From: An Item Response Theory–Based, Computerized Adaptive Testing Version of the MacArthur–Bates Communicative Development Inventory: Words & Sentences (CDI:WS) J Speech Lang Hear Res. 2016;59(2):281-289. doi:10.1044/2015_JSLHR-L-15-0202 Legend: Scatter plot showing the standard error estimates for each child conditionally on the basis of estimated ability level for the different tests simulated in this study. Date of download: 10/22/2017 Copyright © American Speech-Language-Hearing Association