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ERIC Number: ED262094
Record Type: Non-Journal
Publication Date: 1985
Pages: 30
Abstractor: N/A
Reference Count: N/A
Does the Level of Intelligence Decrease? A Comparison between Thirteen-Year-Olds Tested in 1961, 1966 and 1980. Report No. 1985:02.
Emanuelsson, Ingemar; Svensson, Allan
This study investigated possible changes in verbal, spatial, and reasoning intelligence in Swedish 13-year-olds over a 20-year period. The first sample included about 12,000 students born in 1948. Data consisted of (1) information from school records, (2) information on personal background, (3) scores on three intelligence tests and three standardized achievement tests, and (4) replies to questionnaires on pupil attitudes and interests. Students born in 1953 provided similar material for the second set of data. In 1980, a two-step sampling design was used: (1) A stratified sample of 29 out of 277 local communities was drawn. (2) From these communities, a systematic sample of classes from grade six, mostly students born in 1967, was selected. Comparisons were made by year of testing, by sex, and by blue- or white-collar status. Results showed that the average level of spatial and reasoning intelligence had risen over 20 years. Verbal intelligence increased during the 1960's but declined later. Changes in performance were noted between sexes, but not between social groups. Girls advanced more than boys in the verbal test from 1961 to 1980, and overcame the boys' lead in spatial and reasoning ability. (LMO)
Publication Type: Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: National Swedish Board of Education, Stockholm.
Authoring Institution: Goteborg Univ., Molndal (Sweden). Dept. of Education.
Identifiers - Location: Sweden