“…Furthermore, there are children whose language skills deteriorate in preschool or even later in childhood, even if they had normal language skills at an early age (Zambrana et al 2014). Several studies have investigated the factors predicting language impairment/delay at one time point (e.g., Reilly et al 2010) as well as the predictors of different language trajectories (e.g., Armstrong et al 2016;Zambrana et al 2014). A recent study by Armstrong et al (2016), utilized data collected as part of the Mater-University of Queensland Study of Pregnancy (MUSP) birth cohort and, in line with other trajectory studies, described four patterns of change in receptive vocabulary performance between childhood and adulthood (persistently good, persistently poor, improved and deteriorated).…”