Population statistics

Communication ability level (in increasing order)

Ability levels refer to a person communicating with others who speak the same language
C1 Is impossible for people who know him/her well to understand. Finds it impossible to understand people who know him/her well
C2 Is impossible for strangers to understand. Is very difficult for people who know him/her well to understand. Finds it impossible to understand strangers. Finds it very difficult to understand people who know him/her well
C3 Is very difficult for strangers to understand. Is quite difficult for people who know him/her well to understand. Finds it difficult to understand strangers. Finds it quite difficult to understand people who know him/her well
C4 Is quite difficult for strangers to understand. Finds it quite difficult to understand strangers
C5 Other people have some difficulty understanding him/her. Has some difficulty understanding what other people say or what they mean
C6 Full communication ability
Graph showing the percentage of people in each communication ability level.

Graph showing the distribution of communication ability, where those with full ability (C6) are not shown

Important note
These communication ability levels and prevalence statistics are taken directly from the 1996/97 Disability Follow-up Survey (Grundy et al. 1999), which was commissioned by the government to plan welfare support. The GB adult population was 45.6 million at the time of the survey. Please see the Framework section for more detail.