Copyright © American Speech-Language-Hearing Association From: Longitudinal Patterns of Behavioral, Emotional, and Social Difficulties and Self-Concepts in Adolescents With a History of Specific Language Impairment Lang Speech Hear Serv Sch. 2012;43(4):445-460. doi:10.1044/0161-1461(2012/11-0069) Legend: Trajectories of the Strengths and Difficulties Questionnaire (SDQ; Goodman, 1994) total difficulties score and scales from 8 to 16 years (means and standard deviations). Date of download: 11/5/2017 Copyright © American Speech-Language-Hearing Association