Measuring the Complex Syntax of School-Aged Children in Language Sample Analysis: A Known-Groups Validation Study

Background: Complex syntax is affected by developmental language disorder (DLD) during the school years. Targeting areas of syntactic difficulty for children with DLD may yield useful assessment techniques. Aims: To determine whether wh-movement can be measured in language samples from typically developing mono- and bilingual school-aged children, and, if so, to provide preliminary evidence of validity by comparison with traditional measures of syntax in a cross-sectional, known-groups design. Methods & Procedures: Participants were 48 typically developing children recruited from the Canadian province of Nova Scotia in four groups--monolingual English and bilingual French-English children in early (7-8 years of age) and late (11-12 years of age) elementary school. Language samples were collected and analysed with mean use of wh-movement, mean length of utterance and clausal density. These measures were compared for effects of age, bilingual development and elicitation task. Outcomes & Results: The results from all measures closely paralleled each other, providing preliminary evidence of validity. Wh-movement-based and traditional measures demonstrated similar age-related and discourse genre effects. Neither demonstrated an effect of mono- versus bilingual development. Conclusions & Implications: The results confirm research interest in syntactic movement as an area of language assessment. Further research is required to understand its application to clinical populations.