TWENTY ARTICLES AND ABSTRACTS ON THE THEORY AND PRACTICE OF DIAGNOSIS ARE INCLUDED IN THIS REPORT OF THE NATIONAL CONFERENCE OF THE COLLEGE OF SPEECH THERAPISTS IN GLASGOW IN 1966. FOUR PAPERS ON STAMMERING CONSIDER TONGUE THRUSTING, THE NEUROSES INVOLVED, PROGNOSIS, AND DIFFERENTIAL DIAGNOSIS IN DISORDERS OF FLUENCY. OTHER ARTICLES DISCUSS AREAS OF LANGUAGE DEVELOPMENT, LANGUAGE DEFICIENCY IN MENTALLY HANDICAPPED CHILDREN, THE APPARENTLY UNITELLIGIBLE SPEECH OF A 10-YEAR-OLD BOY, TONGUE THRUSTING, AND ASPECTS OF VOCAL INADEQUACY. ADDITIONAL PAPERS TREAT THE PRESENT STATE OF SPEECH THERAPY, READING CAPACITY AND ARTICULATION DEFECT, DIFFICULTIES OF DIAGNOSIS IN SCHOOLS FOR MENTALLY RETARDED CHILDREN, PROGRAMED THERAPY FOR MISARTICULATIONS RESULTING FROM INVERSE PROCESSES OF SELF EVALUATION, RECIPROCAL INHIBITION--A PROCESS OF CONTINUOUS DIAGNOSIS, AND THEORY AND PRACTICE OF DIAGNOSIS. ALSO INCLUDED ARE ABSTRACTS OF FIVE ARTICLES PRINTED IN THE BRITISH JOURNAL OF DISORDERS OF COMMUNICATION. THIS DOCUMENT WAS PUBLISHED AS A SUPPLEMENT TO THE BRITISH JOURNAL OF DISORDERS OF COMMUNICATION PUBLISHED BY E./S. LIVINGSTONE, LTD., EDINBURGH AND LONDON, GREAT BRITAIN, AND IS AVAILABLE IN THE UNITED STATES FROM THE WILLIAMS/WILKINS CO., 428 EAST PRESTON STREET, BALTIMORE, MARYLAND 21202. (GD)