Fig. 1.
Distinct developmental pathways describing children with weak language abilities at middle childhood. The top graph shows a delayed onset oflanguage, the bottom shows a slowed rate of growth in language ability for the disordered group. Adapted by permission from “Using Developmental Trajectories to Understand Developmental Disorders,” by M.S.C. Thomas, D. Annaz, D. Ansari, G. Scerif, C. Jarrold, and A. Karmiloff-Smith, 2009, Journal of Speech, Language and Hearing Research, 52, p. 346. Copyright 2009 by the American Speech Language Hearing Association.