The last 25 years have witnessed an explosion of research at the intersection of typical language development and child language disorders. A pioneer in bringing these fields of study together is Robin S. Chapman, Emerita, University of Wisconsin. This c

Preface. R.S. Chapman, Children's Language Learning: An Interactionist Pespective. R.D. Kent, H.K. Vorperian, In the Mouths of Babes: Anatomic, Motor, and Sensory Foundations of Speech Development in Children. S.E. Weismer, Typical Talkers, Late Talkers, and Children With Specific Language Impairment: A Language Endowment Spectrum? T. Klee, W.J. Gavin, S.F. Stokes, Utterance Length and Lexical Diversity in American- and British-English Speaking Children: What Is the Evidence for a Clinical Marker of SLI? E. Crais, Gesture Development From an Interactionist Perspective. R. Paul, K. Chawarska, A. Klin, F. Volkmar, Dissociations in the Development of Early Communication in Austism Spectrum Disorders. L. Abbeduto, A. McDuffie, Language Learning and Use as Embedded Social Activities: Evidence From Autism and Fragile X Syndrome. M.C. Johnson-Glenberg, Fragile X Syndrome: Memory Skills and the Emergence of Reading in Males. E. Kay-Raining Bird, The Case for Bilingualism in Children With Down Syndrome. H.L. Johnson, The Development of Communicative Competence in Vulnerable Populations. C. Dollaghan, Can Verbs Be Hubs? J. Miller, Documenting Progress in Language Production: The Evolution of a Computerized Language Analysis System. D.M. Bordreau, Narrative Abilities in Children With Language Impairments. S.N. Calculator, Developmental Considerations in Addressing the AAC Needs of Children With Severe Disabilities. L.M. Milosky, E. Skarakis-Doyle, What Else About Comprehension? Examining Young Children's Discourse Comprehension Abilities. R.S. Chapman, The Developmental, Interactionist Perspective: An Afterword.