Searching for articles on Intellectual Disability can be tricky because of all the other labels author's might use like Mental Retardation and Learning Disability. To quickly get all the ID articles (before drilling down to specific issues within ID) I've created a link to a search that gathers all ID articles using all the terms. You just start your search with this link
Intellectual Disabilit(ies/y) OR Learning Disabilit(ies/y) OR Mental Retardation
It will open up the CINAHL Database, run the search using all relevant terms. Just add whatever other topic you need e.g. AND LEISURE, AND SPORT, AND EMPLOYMENT.
Happy Searching!!