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MENTAL SUBNORMALITY IN NORTHERN IRELAND
Author(s) -
McDONALD G.,
MacKAY D. N.
Publication year - 1978
Publication title -
journal of intellectual disability research
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 0.941
H-Index - 104
eISSN - 1365-2788
pISSN - 0964-2633
DOI - 10.1111/j.1365-2788.1978.tb00965.x
Subject(s) - northern ireland , pediatrics , demography , psychiatry , intellectual disability , psychology , population , intelligence quotient , medicine , environmental health , cognition , ethnology , sociology , history
A prevalence survey of mental subnormality in Northern Ireland was carried out on lines similar to an earlier investigation by MacKay (1971). In a general population of one and a half million there were 6,854 ascertained subnormal individuals. The male : female ratio was 1. 14 :1. Approximately one in three subnormal people was under residential care. The prevalence of severe subnormality (IQ less than 50) in the 15-19 year old group was 4.81. The findings do not support the "steady rate" theory of severe subnormality.