Abstract
The survey described formed the main part of the work involved in setting up a new department of Speech Therapy at The Manor Hospital, Epsom. This is a h >spital for assessment, treatment and training of mentally subnormal patients, in all age groups and with intelligence quotients in the severely subnormal (below 55), subnormal (56-70) and borderline normal ranges. The population is drawn from all socio-economic groups and lengths of institutionalisation of the patients range from 45 years to a number of weeks.