The Disability Assessment Schedule: a brief screening device for use with the mentally retarded

Severe impairments of social interaction and associated abnormalities in children: Epidemiology and classification

1979 • 2,523 citations

SYMBOLIC PLAY IN SEVERELY MENTALLY RETARDED AND IN AUTISTIC CHILDREN

1977 • 298 citations

Reliability of the PSE (ninth edition) used in a population study

1977 • 254 citations

Systematic recording of behaviors and skills of retarded and psychotic children

1978 • 207 citations

A method of rating behaviour characteristies for use in large scale surveys of mental handicap

1973 • 198 citations

The Analysis of Cross-Tabulated Data.

1979 • 190 citations

LANGUAGE DEVELOPMENT AND NON‐VERBAL SKILLS IN SEVERELY MENTALLY RETARDED CHILDREN: AN EPIDEMIOLOGICAL STUDY

1976 • 28 citations