Manuel signing is one of the most widely used approaches to support the communication and language skills of children and adults who have intellectual or developmental disabilities, and problems with communication in spoken language. A recent series of papers reporting findings from this population raises some critical issues for professionals in the assessment of multimodal language skills of key word signers. Approaches to assessment will differ depending on whether key word signing (KWS) is viewed as discrete from, or related to, natural sign languages. Two available assessments from these different perspectives are compared. Procedures appropriate to the assessment of sign language production are recommended as a valuable addition to the clinicians' toolkit. Sign and speech need to be viewed as multimodal, complementary communicative endeavours, rather than as polarities.Whilst narrative has been shown to be a fruitful context for eliciting language samples, assessments for adult users should be designed to suit the strengths, needs and values of adult signers with intellectual disabilities, using materials that are compatible with their life course stage rather than those designed for young children.
Keywords:Intellectual disability; Augmentative and alternative communication; Manual signing; Sign language; Key word signing; Narrative task; Language assessment
I. BackgroundAssessing language skills key word signers 2/11/2016 2 Manual signing is one of the most widely used approaches to support the communication and language skills of children and adults who have intellectual or developmental disabilities, and problems with communication in spoken language. This paper considers some of the issues involved for professionals in assessing the language skills of key word signers and discusses some of the methodological problems raised by a recent paper on the topic.