Purpose: In this study, the authors examined the impact of sampling context on multiple aspects of expressive language in male participants with fragile X syndrome in comparison to male participants with Down syndrome or typical development. Method: Participants with fragile X syndrome (n = 27), ages 10-17 years, were matched groupwise on…

Language sample analysis measures have long been promoted as exhibiting greater ecological validity than formal testing in the assessment of language disorder in children. In practice, their use is often restricted to preschool children, owing to lack of normative information, as well as criticisms of the validity of commonly used measures for the…

Purpose: The authors describe the procedures used to explain an unexpected finding that adolescents with Down syndrome (DS) had a lower mean length of utterance (MLU) than typically developing (TD) children in interviews without picture support, but not in narratives supported by wordless picture books. They hypothesize that the picture support of…