Both individuals with intellectual disabilities (ID) and staff may be more inclined to use manual signs during formal than informal activities. In addition, the sign use of individuals with ID and staff is positively related. It is unclear if activity type and the sign use of staff interact as they shape the sign use of individuals with ID.. To read the full article, log in using your MPFT NHS OpenAthens details. SSOTP (legacy account) - You can request a copy of this article by replying to this email. Please ensure you are clear which article you are requesting.