A book or a paper should have an attractive appearance, and for an adult audience, it should not give a childish impression. Differences in reading ability also exist within groups with reading problems. It is important to keep in mind that people with intellectual disabilities, for instance, are not a homogenous group, they range from severe cases to people on the border of normal intelligence. These include all genres like novels, short-stories, thrillers, poetry, travel books, etc. It can be said that the audience for easily understandable news and information about society is probably even larger than the audience for books.
Many people experience difficulties in understanding normal news channels.
Articles in newspapers are too long, written in a language that is too difficult, and contain too many specialised terms. The reader is also assumed to have substantial background information in order for the reporting to be comprehensible. Television news flickers by at a pace that is much too rapid for many people. Multimedia or IT in particular may be of great interest to functional illiterates and weak readers and here it is a question of adapting the software so that it can also be used by these groups. One might then continue by dividing fiction into various genres, and by dividing non-fiction in the same manner.