Mark Rapley extends and reformulates current work in disability studies and offers a reconceptualisation of intellectual disability as both a professionally ascribed diagnostic category and an accomplished - and contested - social identity. Through a range of case studies, which draw upon ethnomethodological and conversation analytic scholarship, the book shows how persons categorized as 'intellectually disabled' are produced, as such, in and through their moment-by-moment interaction with care staff and other professionals. This study, the first book-length application of discursive psychology to intellectual disability, shows that what we usually understand as being an individual problem is actually an interactional, or social, product. Intellectual disability is usually thought of as a form of internal, individual affliction, little different from diabetes, paralysis or chronic illness.