Considering communication disorders and differences in the signed language modality / David Quinto-Pozos -- Profiling SLI in deaf children who are sign language users / Rosalind Herman, Katherine Rowley, Chloë Marshall, Kathryn Mason, Joanna Atkinson, Bencie Woll and Gary Morgan -- A case-study approach to investigating developmental signed language disorders / David Quinto-Pozos, Jenny L. Singleton, Peter C. Hauser and Susan L. Levine -- The acquisition of sign language by deaf children with autism spectrum disorder / Aaron Shield and Richard P. Meier -- Mapping out guidelines for the development and use of sign language assessments: some critical issues, comments and suggestions / Wolfgang Mann and Tobias Haug -- A review of stuttering in signed languages / Geoffrey Whitebread -- Sign dysarthria: a speech disorder in signed language / Martha E. Tyrone -- The influence of dementia on language in a signing population / Patricia Spanjer, Mariëlle Fieret and Anne Baker -- KODAs: a special form of bilingualism / Anne E. Baker and Beppie Van den Bogaerde -- Language development in ASL-English bimodal bilinguals / Deborah Chen Pichler, James Lee and Diane Lillo-Martin.