“…Language development is also arguably one of the most rapid aspects of development, and shows great variability between children (Bates, Dale, & Thal, 1995;Fenson et al, 2000;Fenson, Dale, Reznick, & Bates, 1994), as well as being sensitive to a number of negative factors that are more common in this setting, including HIV infection, cerebral malaria, meningitis, and other causes of brain injury and dysfunction (Baker, Kummer, Schultz, & Ho, 1996;Bates et al, 1997;Brouwers et al, 2001;Davis et al, 1997;McNeilly, 2005;Wolters, Brouwers, Civitello, & Moss, 1997). Its study therefore has become in recent years an essential part of studies of child development outcomes following exposures and interventions in the prenatal period and infancy (A. Abubakar, Van Baar, Prado et al, 2010;Stoltzfus et al, 2001).…”