Developmental disability rates may vary by the season or month in which children are born. However, the seasonal mechanisms, such as climate, underlying these variations are unclear. Previous studies focused on high-latitude regions, leaving this climate hypothesis only partially tested. We analyzed rates of developmental disabilities in 3- to…

The etiological mechanisms of the genetic underpinnings of developmental language disorder (DLD) are unknown, in part due to the behavioral heterogeneity of the disorder's manifestations. In this study, we explored an association between the SETBP1 gene (18q21.1), revealed in a genome-wide association study of DLD in a geographically isolated…

Like other developmental disorders such as Attention Deficit Hyperactivity Disorder, specific language impairment and dyslexia, there is no shortage of debate surrounding the condition of Developmental Coordination Disorder. The present article takes a global view of many of these debatable issues, starting with definition and terminology, moving…

Prader-Willi syndrome (PWS) is a genetic disorder which has widespread developmental consequences including motor, cognitive and language delay. Previous research on PWS children has focused primarily on phonological development and dysfluency. In the present study, the lexical development of a boy with PWS was investigated in a series of 18 play…

Late talkers with specific language impairment and developmental delay make up a large portion of our early childhood caseloads; therefore, an understanding of best clinical practices for these populations is essential. Early lexical learning was examined in 2 interactive treatment approaches with 29 late-talking preschoolers with language and…

Purpose: This study examined the effects of expressive and receptive language levels on initiated and repaired communication acts by prelinguistic children with developmental disabilities. Method: In this descriptive study, participants were 45 children between the ages of 3 and 6 years who had severe delays in expressive communication. Some…