Pragmatic Language Assessment in Williams Syndrome: A Comparison of the Test of Pragmatic Language—2 and the Children's Communication Checklist—2

Purpose Individuals with Williams syndrome (WS) are recognized as having a strong desire for social relationships, yet many of them have difficulty forming and maintaining peer relationships. One cause may be impairments in pragmatic language. The current study compared the assessment of pragmatic language skills in individuals with WS using the Test of Pragmatic Language—Second Edition (TOPL–2; Phelps-Terasaki & Phelps-Gunn, 2007) and the Children's Communication Checklist—Second Edition (CCC–2; Bishop, 2003). Method Twenty children and adolescents diagnosed with WS were given the TOPL–2, and their parents completed the CCC–2. Results The TOPL–2 identified 8 of the 14 older children (ages 8–16 years) as having pragmatic language impairment and all of the 6 younger children (ages 6–7 years) as having such. In comparison, the CCC–2 identified 6 of the 14 older children and 2 of the 6 younger children as having pragmatic language impairment. The older group also had a higher composite score than the younger group on the CCC–2. Conclusion The TOPL–2 identified significantly more participants as having pragmatic language impairment than did the CCC–2. The TOPL–2 may be more useful in assessing pragmatic language in older children than younger children. The results offer important preliminary clinical implications of language measures that may be beneficial in the assessment of individuals with WS.